CVE-2021-21307 (GCVE-0-2021-21307)

Vulnerability from cvelistv5 – Published: 2021-02-11 18:20 – Updated: 2024-08-03 18:09
VLAI Previdian
Title
Remote Code Exploit in Lucee Admin
Summary
Lucee Server is a dynamic, Java based (JSR-223), tag and scripting language used for rapid web application development. In Lucee Admin before versions 5.3.7.47, 5.3.6.68 or 5.3.5.96 there is an unauthenticated remote code exploit. This is fixed in versions 5.3.7.47, 5.3.6.68 or 5.3.5.96. As a workaround, one can block access to the Lucee Administrator.
Severity
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
CWE
Assigner
References
Impacted products
Vendor Product Version
lucee Lucee Affected: >= 5.3.5.0, < 5.3.5.96
Affected: >= 5.3.6.0, < 5.3.6.68
Affected: >= 5.3.7.0, < 5.3.7.47
Create a notification for this product.
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 2b9489b4-89d1-4744-9f33-a226a1927f11

Vulnerability ID: CVE-2021-21307

Status: Confirmed

Status Updated: 2025-04-22 02:00 CEST

Exploited: Yes

Timestamps
First Seen: 2025-04-22
Asserted: 2025-04-22
Scope
Notes: Remote Code Exploit in Lucee Admin | Affected: Lucee / Lucee | CVSS: 8.6 (HIGH) | EPSS: 0.89189 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian

Details
Feed Previdian (previdian.com)
Title Remote Code Exploit in Lucee Admin
Cve Id CVE-2021-21307
Vendor Lucee
Ghsa Id None
Product Lucee
Added Date 2025-04-22T00:00:00.000Z
Cvss Score 8.6
Epss Score 0.89189
Previous Ids
Cvss Severity HIGH
Virtual Patch False
Cvss Estimated False
Epss Percentile 0.99779
Used In Malware unknown
Vulnerability Id CVE-2021-21307
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-10-02 09:10 CEST | Updated: 2026-10-02 09:10 CEST
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:09:15.162Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/lucee/Lucee/security/advisories/GHSA-2xvv-723c-8p7r"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/lucee/Lucee/commit/6208ab7c44c61d26c79e0b0af10382899f57e1ca"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://dev.lucee.org/t/lucee-vulnerability-alert-november-2020/7643"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/httpvoid/writeups/blob/main/Apple-RCE.md"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://portswigger.net/daily-swig/security-researchers-earn-50k-after-exposing-critical-flaw-in-apple-travel-portal"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://ciacfug.org/blog/updating-lucee-as-part-of-a-vulnerability-alert-response"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/163864/Lucee-Administrator-imgProcess.cfm-Arbitrary-File-Write.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Lucee",
          "vendor": "lucee",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 5.3.5.0, \u003c 5.3.5.96"
            },
            {
              "status": "affected",
              "version": "\u003e= 5.3.6.0, \u003c 5.3.6.68"
            },
            {
              "status": "affected",
              "version": "\u003e= 5.3.7.0, \u003c 5.3.7.47"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Lucee Server is a dynamic, Java based (JSR-223), tag and scripting language used for rapid web application development. In Lucee Admin before versions 5.3.7.47, 5.3.6.68 or 5.3.5.96 there is an unauthenticated remote code exploit. This is fixed in versions 5.3.7.47, 5.3.6.68 or 5.3.5.96. As a workaround, one can block access to the Lucee Administrator."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-862",
              "description": "CWE-862: Missing Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-08-17T16:06:12.000Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/lucee/Lucee/security/advisories/GHSA-2xvv-723c-8p7r"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/lucee/Lucee/commit/6208ab7c44c61d26c79e0b0af10382899f57e1ca"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://dev.lucee.org/t/lucee-vulnerability-alert-november-2020/7643"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/httpvoid/writeups/blob/main/Apple-RCE.md"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://portswigger.net/daily-swig/security-researchers-earn-50k-after-exposing-critical-flaw-in-apple-travel-portal"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://ciacfug.org/blog/updating-lucee-as-part-of-a-vulnerability-alert-response"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://packetstormsecurity.com/files/163864/Lucee-Administrator-imgProcess.cfm-Arbitrary-File-Write.html"
        }
      ],
      "source": {
        "advisory": "GHSA-2xvv-723c-8p7r",
        "discovery": "UNKNOWN"
      },
      "title": "Remote Code Exploit in Lucee Admin",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security-advisories@github.com",
          "ID": "CVE-2021-21307",
          "STATE": "PUBLIC",
          "TITLE": "Remote Code Exploit in Lucee Admin"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Lucee",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "\u003e= 5.3.5.0, \u003c 5.3.5.96"
                          },
                          {
                            "version_value": "\u003e= 5.3.6.0, \u003c 5.3.6.68"
                          },
                          {
                            "version_value": "\u003e= 5.3.7.0, \u003c 5.3.7.47"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "lucee"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "Lucee Server is a dynamic, Java based (JSR-223), tag and scripting language used for rapid web application development. In Lucee Admin before versions 5.3.7.47, 5.3.6.68 or 5.3.5.96 there is an unauthenticated remote code exploit. This is fixed in versions 5.3.7.47, 5.3.6.68 or 5.3.5.96. As a workaround, one can block access to the Lucee Administrator."
            }
          ]
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-862: Missing Authorization"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/lucee/Lucee/security/advisories/GHSA-2xvv-723c-8p7r",
              "refsource": "CONFIRM",
              "url": "https://github.com/lucee/Lucee/security/advisories/GHSA-2xvv-723c-8p7r"
            },
            {
              "name": "https://github.com/lucee/Lucee/commit/6208ab7c44c61d26c79e0b0af10382899f57e1ca",
              "refsource": "MISC",
              "url": "https://github.com/lucee/Lucee/commit/6208ab7c44c61d26c79e0b0af10382899f57e1ca"
            },
            {
              "name": "https://dev.lucee.org/t/lucee-vulnerability-alert-november-2020/7643",
              "refsource": "MISC",
              "url": "https://dev.lucee.org/t/lucee-vulnerability-alert-november-2020/7643"
            },
            {
              "name": "https://github.com/httpvoid/writeups/blob/main/Apple-RCE.md",
              "refsource": "MISC",
              "url": "https://github.com/httpvoid/writeups/blob/main/Apple-RCE.md"
            },
            {
              "name": "https://portswigger.net/daily-swig/security-researchers-earn-50k-after-exposing-critical-flaw-in-apple-travel-portal",
              "refsource": "MISC",
              "url": "https://portswigger.net/daily-swig/security-researchers-earn-50k-after-exposing-critical-flaw-in-apple-travel-portal"
            },
            {
              "name": "http://ciacfug.org/blog/updating-lucee-as-part-of-a-vulnerability-alert-response",
              "refsource": "MISC",
              "url": "http://ciacfug.org/blog/updating-lucee-as-part-of-a-vulnerability-alert-response"
            },
            {
              "name": "http://packetstormsecurity.com/files/163864/Lucee-Administrator-imgProcess.cfm-Arbitrary-File-Write.html",
              "refsource": "MISC",
              "url": "http://packetstormsecurity.com/files/163864/Lucee-Administrator-imgProcess.cfm-Arbitrary-File-Write.html"
            }
          ]
        },
        "source": {
          "advisory": "GHSA-2xvv-723c-8p7r",
          "discovery": "UNKNOWN"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2021-21307",
    "datePublished": "2021-02-11T18:20:21.000Z",
    "dateReserved": "2020-12-22T00:00:00.000Z",
    "dateUpdated": "2024-08-03T18:09:15.162Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-21307",
      "date": "2026-10-05",
      "epss": "0.89189",
      "percentile": "0.99779"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "Lucee",
                "vendor": "lucee",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003e= 5.3.5.0, \u003c 5.3.5.96"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 5.3.6.0, \u003c 5.3.6.68"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 5.3.7.0, \u003c 5.3.7.47"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:lucee:lucee_server:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "F63963E7-D380-493F-B75B-4FBCDD646D97",
                    "versionEndExcluding": "5.3.5.96",
                    "versionStartIncluding": "5.3.5.00",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:lucee:lucee_server:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "3653F1B9-18A4-4AA2-906E-C74FD9FF0611",
                    "versionEndExcluding": "5.3.6.68",
                    "versionStartIncluding": "5.3.6.00",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:lucee:lucee_server:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "9ED241BC-C6BA-4DBC-BD08-3FC8A529350E",
                    "versionEndExcluding": "5.3.7.47",
                    "versionStartIncluding": "5.3.7.00",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Lucee Server is a dynamic, Java based (JSR-223), tag and scripting language used for rapid web application development. In Lucee Admin before versions 5.3.7.47, 5.3.6.68 or 5.3.5.96 there is an unauthenticated remote code exploit. This is fixed in versions 5.3.7.47, 5.3.6.68 or 5.3.5.96. As a workaround, one can block access to the Lucee Administrator."
          },
          {
            "lang": "es",
            "value": "Lucee Server es un lenguaje din\u00e1mico, de etiquetado y scripting de comandos basado en Java (JSR-223) que es utilizado para el desarrollo r\u00e1pido de aplicaciones web.\u0026#xa0;En Lucee Admin anterior a versiones 5.3.7.47, 5.3.6.68 o 5.3.5.96 se presenta una explotaci\u00f3n de c\u00f3digo remota no autenticada.\u0026#xa0;Esto es corregido en las versiones 5.3.7.47, 5.3.6.68 o 5.3.5.96.\u0026#xa0;Como soluci\u00f3n alternativa, se puede bloquear el acceso a Lucee Administrator"
          }
        ],
        "id": "CVE-2021-21307",
        "lastModified": "2026-06-17T03:35:15.687",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "HIGH",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 7.5,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 10.0,
              "impactScore": 6.4,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 8.6,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 4.0,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.8,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2021-02-11T19:15:13.313",
        "references": [
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "http://ciacfug.org/blog/updating-lucee-as-part-of-a-vulnerability-alert-response"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Exploit",
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://packetstormsecurity.com/files/163864/Lucee-Administrator-imgProcess.cfm-Arbitrary-File-Write.html"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://dev.lucee.org/t/lucee-vulnerability-alert-november-2020/7643"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Exploit",
              "Third Party Advisory"
            ],
            "url": "https://github.com/httpvoid/writeups/blob/main/Apple-RCE.md"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://github.com/lucee/Lucee/commit/6208ab7c44c61d26c79e0b0af10382899f57e1ca"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Product"
            ],
            "url": "https://github.com/lucee/Lucee/security/advisories/GHSA-2xvv-723c-8p7r"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Press/Media Coverage",
              "Third Party Advisory"
            ],
            "url": "https://portswigger.net/daily-swig/security-researchers-earn-50k-after-exposing-critical-flaw-in-apple-travel-portal"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "http://ciacfug.org/blog/updating-lucee-as-part-of-a-vulnerability-alert-response"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://packetstormsecurity.com/files/163864/Lucee-Administrator-imgProcess.cfm-Arbitrary-File-Write.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://dev.lucee.org/t/lucee-vulnerability-alert-november-2020/7643"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "Third Party Advisory"
            ],
            "url": "https://github.com/httpvoid/writeups/blob/main/Apple-RCE.md"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://github.com/lucee/Lucee/commit/6208ab7c44c61d26c79e0b0af10382899f57e1ca"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Product"
            ],
            "url": "https://github.com/lucee/Lucee/security/advisories/GHSA-2xvv-723c-8p7r"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Press/Media Coverage",
              "Third Party Advisory"
            ],
            "url": "https://portswigger.net/daily-swig/security-researchers-earn-50k-after-exposing-critical-flaw-in-apple-travel-portal"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-862"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.