How severe is CVE-2023-22515?

CVE-2023-22515 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2023-22515?

Affected package information for CVE-2023-22515 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2023-22515?

No fixed version has been published for CVE-2023-22515 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2023-22515 actively exploited in the wild?

Yes. There are 30 known exploit references for CVE-2023-22515, including 18 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2023-22515?

CVE-2023-22515 has an EPSS (Exploit Prediction Scoring System) score of 94.3%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2023-22515 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2023-22515 (Atlassian Confluence Data Center and Server Broken Access Control Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2023-10-05. CISA required all US federal civilian agencies to remediate this vulnerability by 2023-10-13. The required action was: 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. This CVE has been used in known ransomware campaigns. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2023-22515?

CVE-2023-22515 is classified as Improper Input Validation (CWE-20). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2023-22515?

CVE-2023-22515 affects atlassian confluence data center; atlassian confluence server. Check the affected-products list on this page against your deployed version to confirm exposure.

Is there exploit tooling available for CVE-2023-22515?

A Nuclei detection template exists for CVE-2023-22515, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2023-22515 published, and has it been updated?

CVE-2023-22515 was published on October 4, 2023 and was last updated on March 25, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2023-10-05 — agencies required to remediate by 2023-10-13 · Ransomware

CVE-2023-22515

CRITICAL

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…

Published

Oct 4, 2023

Updated

Mar 25, 2026

Affected

0 pkgs

Patched

None yet

Exploits

30 known

EPSS Exploitation Probability

via FIRST.org ↗

94.3%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

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.

Affected Products

2 products · 6 configurations

Application

confluence data centeratlassian

≥ 8.5.0 && < 8.5.2

range

Application

confluence serveratlassian

≥ 8.5.0 && < 8.5.2

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.