CVE-2023-22515: Atlassian Confluence Data Center and Server Broken Access Control Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on , 1 day after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 99.2%
EPSS score, percentile 99.9 of all scored records
- How severe?
- 10.0 Critical
CVSS v3.0 base score, given by the CNA
- What should I do?
CISA deadline . Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Full text
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- >= 8.0.0
- >= 8.0.1
- >= 8.0.2
- >= 8.0.3
- >= 8.1.3
- >= 8.1.4
and 16 more in the table below
Unaffected < 8.0.0; < 8.0.0
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
What to do
Required action, set by CISA
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.
CISA due date for this action: .
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
Linked from CISA's catalog entry
- 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
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| 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 |
And 10 more version entries in the CVE record.
| Status | Versions |
|---|---|
| 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 |
And 10 more version entries in the CVE record.
Versions the record lists as unaffected: < 8.0.0, >= 8.3.3, >= 8.4.3, >= 8.5.2.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
About this vulnerability
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.
Summary: CISA's KEV catalog, as of .
- CISA added CVE-2023-22515 to its Known Exploited Vulnerabilities (KEV) catalog on 5 Oct 2023.
- CISA marks it as known to be used in ransomware campaigns.
- The due date CISA sets for the required action is 13 Oct 2023.
- The CVE record was published on 4 Oct 2023, 1 day before it was added to KEV.
- The CVE record carries a CVSS v3.0 base score of 10.0 (Critical), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 99.2% (percentile 99.9), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact total.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of . About the data.
Description
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.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
Weakness
- CWE-20: Improper Input Validation
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| Added to CISA KEV | |
| CISA due date for the required action | |
| CVE record last updated |
References
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