CVE-2023-22515 (GCVE-0-2023-22515)
Vulnerability from cvelistv5 – Published: 2023-10-04 14:00 – Updated: 2026-03-25 14:56Summary
Atlassian has been made aware of an issue reported by a handful of customers where external attackers may have exploited a previously unknown vulnerability in publicly accessible Confluence Data Center and Server instances to create unauthorized Confluence administrator accounts and access Confluence instances.
Atlassian Cloud sites are not affected by this vulnerability. If your Confluence site is accessed via an atlassian.net domain, it is hosted by Atlassian and is not vulnerable to this issue.
Severity
10 (Critical)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2023-12-09 05:05 UTC
CWE
- BASM (Broken Authentication & Session Management)
- CWE-20 - Improper Input Validation
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Atlassian | Confluence Data Center |
Unaffected:
< 8.0.0
Affected: >= 8.0.0 Affected: >= 8.0.1 Affected: >= 8.0.2 Affected: >= 8.0.3 Affected: >= 8.1.3 Affected: >= 8.1.4 Affected: >= 8.2.0 Affected: >= 8.2.1 Affected: >= 8.2.2 Affected: >= 8.2.3 Affected: >= 8.3.0 Affected: >= 8.3.1 Affected: >= 8.3.2 Affected: >= 8.4.0 Affected: >= 8.4.1 Affected: >= 8.4.2 Affected: >= 8.5.0 Affected: >= 8.5.1 Unaffected: >= 8.3.3 Unaffected: >= 8.4.3 Unaffected: >= 8.5.2 |
|
| Atlassian | Confluence Server |
Unaffected:
< 8.0.0
Affected: >= 8.0.0 Affected: >= 8.0.1 Affected: >= 8.0.2 Affected: >= 8.0.3 Affected: >= 8.1.3 Affected: >= 8.1.4 Affected: >= 8.2.0 Affected: >= 8.2.1 Affected: >= 8.2.2 Affected: >= 8.2.3 Affected: >= 8.3.0 Affected: >= 8.3.1 Affected: >= 8.3.2 Affected: >= 8.4.0 Affected: >= 8.4.1 Affected: >= 8.4.2 Affected: >= 8.5.0 Affected: >= 8.5.1 Unaffected: >= 8.3.3 Unaffected: >= 8.4.3 Unaffected: >= 8.5.2 |
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 715a525c-9e63-4b4f-b086-7ce4007bc736
Exploited: Yes
Timestamps
First Seen: 2023-10-05
Asserted: 2023-10-05
Scope
Notes: Atlassian Confluence Data Center and Server Broken Access Control Vulnerability | Affected: Atlassian / Confluence Data Center and Server | Description: Atlassian Confluence Data Center and Server contains a broken access control vulnerability that allows an attacker to create unauthorized Confluence administrator accounts and access Confluence. | Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Check all affected Confluence instances for evidence of compromise per vendor instructions and report any positive findings to CISA. | Due date: 2023-10-13 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://confluence.atlassian.com/security/cve-2023-22515-privilege-escalation-vulnerability-in-confluence-data-center-and-server-1295682276.html; https://nvd.nist.gov/vuln/detail/CVE-2023-22515
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Confluence Data Center and Server |
| Due Date | 2023-10-13 |
| Date Added | 2023-10-05 |
| Vendorproject | Atlassian |
| Vulnerabilityname | Atlassian Confluence Data Center and Server Broken Access Control Vulnerability |
| Knownransomwarecampaignuse | Known |
References
Created: 2026-10-02 08:09 CEST
| Updated: 2026-10-02 08:09 CEST
ENISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 8d074859-a2fb-4174-a2e0-e9d2f191f8d3
Exploited: Yes
Timestamps
First Seen: 2025-01-23
Asserted: 2025-01-23
Scope
Notes: Affected: Atlassian / Confluence Server and Data Server | Description: Vulnerability in publicly accessible Confluence Data Center and Server instances that enables the creation of unauthorized Confluence administrator accounts and access to a Confluence instance | Patched since: 2023/10/04 | Exploitation type: ransomware | Origin source: CNW
Evidence
Type: Csirt Report
Signal: Confirmed Compromise
Confidence: 75%
Source: enisa-cnw-kev
Details
| Cwes | |
|---|---|
| Euvd | EUVD-2023-26655 |
| Notes | |
| Catalog | ENISA / EU CSIRTs Network (CNW) KEV JSON |
| Product | Confluence Server and Data Server |
| Datereported | 2025/01/23 |
| Originsource | CNW |
| Patchedsince | 2023/10/04 |
| Vendorproject | Atlassian |
| Exploitationtype | ransomware |
| Vulnerabilityname | |
| Threatactorsexploiting |
References
Created: 2026-10-02 08:52 CEST
| Updated: 2026-10-02 08:52 CEST
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 72a23b1a-5e71-4e8c-8d2e-f8db253a13c5
Exploited: Yes
Timestamps
First Seen: 2023-10-05
Asserted: 2023-10-05
Scope
Notes: Atlassian has been made aware of an issue reported by a handful of customers where external attackers may have exploited a previously unknown... | Affected: Atlassian / Confluence Data Center, Confluence Server | CVSS: 9.8 (CRITICAL) | EPSS: 0.99156 | Used in malware: yes | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Confirmed Compromise
Confidence: 70%
Source: previdian
Details
| Feed | Previdian (previdian.com) |
|---|---|
| Title | Atlassian has been made aware of an issue reported by a handful of customers where external attackers may have exploited a previously unknown... |
| Cve Id | CVE-2023-22515 |
| Vendor | Atlassian |
| Ghsa Id | None |
| Product | Confluence Data Center, Confluence Server |
| Added Date | 2023-10-05T00:00:00.000Z |
| Cvss Score | 9.8 |
| Epss Score | 0.99156 |
| Previous Ids | |
| Cvss Severity | CRITICAL |
| Virtual Patch | False |
| Cvss Estimated | False |
| Epss Percentile | 0.99933 |
| Used In Malware | yes |
| Vulnerability Id | CVE-2023-22515 |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-10-02 09:11 CEST
| Updated: 2026-10-02 09:11 CEST
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],
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},
"vulnrichment": {
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"cna": {
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"vendor": "Atlassian",
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"state": "PUBLISHED"
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}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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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.
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