CVE-2023-22515
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.
Actively exploited
- In the CISA exploited-vulnerabilities catalogue since Oct 5, 2023
- US federal agencies must remediate it by Oct 13, 2023 (BOD 22-01)
- Attacked 1 day before the vulnerability was made public
- Confirmed by sensors, not only by reports
- Used in ransomware campaigns
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.
Source: CISA KEV · Oct 11, 2026 Oct 10, 2026 Oct 3, 2026 Oct 2, 2026 Oct 1, 2026 Sep 30, 2026
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected products
| Vendors | Product | Versions |
|---|---|---|
| atlassian | confluence data center | < 8.3.3 |
| atlassian | confluence server | < 8.3.3 |
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This product uses the NVD API but is not endorsed or certified by the NVD.