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EUVD-2026-36343

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 06:03

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T06:03:39.912180+00:00",
  "id": "EUVD-2026-36343"
}

CVE-2020-4049 (GCVE-0-2020-4049)

Vulnerability from cvelistv5 – Published: 2020-06-12 16:00 – Updated: 2024-08-04 07:52

Title

Authenticated self-XSS via theme uploads in WordPress

Summary

In affected versions of WordPress, when uploading themes, the name of the theme folder can be crafted in a way that could lead to JavaScript execution in /wp-admin on the themes page. This does require an admin to upload the theme, and is low severity self-XSS. This has been patched in version 5.4.2, along with all the previously affected versions via a minor release (5.3.4, 5.2.7, 5.1.6, 5.0.10, 4.9.15, 4.8.14, 4.7.18, 4.6.19, 4.5.22, 4.4.23, 4.3.24, 4.2.28, 4.1.31, 4.0.31, 3.9.32, 3.8.34, 3.7.34).

Severity

2.4 (Low)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N

CWE

CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Assigner

GitHub_M mitre root Scorecard

References

8 references

URL	Tags
https://wordpress.org/news/2020/06/wordpress-5-4-…	x_refsource_MISC
https://github.com/WordPress/wordpress-develop/se…	x_refsource_CONFIRM
https://github.com/WordPress/wordpress-develop/co…	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://www.debian.org/security/2020/dsa-4709	vendor-advisoryx_refsource_DEBIAN
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST

Impacted products

1 product

Vendor	Product	Version
WordPress	wordpress-develop	Affected: >= 5.4.0, < 5.4.2 Affected: >= 5.3.0, < 5.3.4 Affected: >= 5.2.0, < 5.2.7 Affected: >= 5.1.0, < 5.1.6 Affected: >= 5.0.0, < 5.0.10 Affected: >= 4.9.0, < 4.9.15 Affected: >= 4.8.0, < 4.8.14 Affected: >= 4.7.0, < 4.7.18 Affected: >= 4.6.0, < 4.6.19 Affected: >= 4.5.0, < 4.5.22 Affected: >= 4.4.0, < 4.4.23 Affected: >= 4.3.0, < 4.3.24 Affected: >= 4.2.0, < 4.2.28 Affected: >= 4.1.0, < 4.1.31 Affected: >= 4.0.0, < 4.0.31 Affected: >= 3.9.0, < 3.9.32 Affected: >= 3.8.0, < 3.8.34 Affected: >= 3.7.0, < 3.7.34

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T07:52:20.760Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "references": [
          {
            "tags": [
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              "x_transferred"
            ],
            "url": "https://wordpress.org/news/2020/06/wordpress-5-4-2-security-and-maintenance-release/"
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            "tags": [
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            "url": "https://github.com/WordPress/wordpress-develop/commit/404f397b4012fd9d382e55bf7d206c1317f01148"
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          "vendor": "WordPress",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 5.4.0, \u003c 5.4.2"
            },
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              "status": "affected",
              "version": "\u003e= 5.3.0, \u003c 5.3.4"
            },
            {
              "status": "affected",
              "version": "\u003e= 5.2.0, \u003c 5.2.7"
            },
            {
              "status": "affected",
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              "version": "\u003e= 4.9.0, \u003c 4.9.15"
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            {
              "status": "affected",
              "version": "\u003e= 4.8.0, \u003c 4.8.14"
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            {
              "status": "affected",
              "version": "\u003e= 4.7.0, \u003c 4.7.18"
            },
            {
              "status": "affected",
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            },
            {
              "status": "affected",
              "version": "\u003e= 4.5.0, \u003c 4.5.22"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.4.0, \u003c 4.4.23"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.3.0, \u003c 4.3.24"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.2.0, \u003c 4.2.28"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.1.0, \u003c 4.1.31"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.0.0, \u003c 4.0.31"
            },
            {
              "status": "affected",
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              "status": "affected",
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        }
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        {
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 2.4,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
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        },
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          "tags": [
            "x_refsource_CONFIRM"
          ],
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        },
        {
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          "url": "https://github.com/WordPress/wordpress-develop/commit/404f397b4012fd9d382e55bf7d206c1317f01148"
        },
        {
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          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ODNHXVJS25YVWYQHOCICXTLIN5UYJFDN/"
        },
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        },
        {
          "name": "DSA-4709",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2020/dsa-4709"
        },
        {
          "name": "[debian-lts-announce] 20200701 [SECURITY] [DLA 2269-1] wordpress security update",
          "tags": [
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            "x_refsource_MLIST"
          ],
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        },
        {
          "name": "[debian-lts-announce] 20200911 [SECURITY] [DLA 2371-1] wordpress security update",
          "tags": [
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            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2020/09/msg00011.html"
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      "source": {
        "advisory": "GHSA-87h4-phjv-rm6p",
        "discovery": "UNKNOWN"
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      "title": "Authenticated self-XSS via theme uploads in WordPress",
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        },
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                            "version_value": "\u003e= 4.1.0, \u003c 4.1.31"
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                          {
                            "version_value": "\u003e= 4.0.0, \u003c 4.0.31"
                          },
                          {
                            "version_value": "\u003e= 3.9.0, \u003c 3.9.32"
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            {
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    "cveId": "CVE-2020-4049",
    "datePublished": "2020-06-12T16:00:23.000Z",
    "dateReserved": "2019-12-30T00:00:00.000Z",
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    "state": "PUBLISHED"
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}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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EUVD-2026-36343

CVE-2020-4049 (GCVE-0-2020-4049)

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Sightings

Nomenclature

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