CVSS base score: 10.0 (Critical) vendor CNA · v3.0
Score assigned by the vendor's own CVE Numbering Authority (CNA); CISA's Vulnrichment program adds a score only when the CNA omits one.
Atlassian Confluence Data Center and Server Broken Access Control Vulnerability
Vendor: Atlassian Product: Confluence Data Center and Server
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.
Each milestone comes from a different source, so gaps between them are gaps in what those sources publish, not evidence that nothing happened. EPSS history for this CVE holds 167 points from 2023-10-07, tracked daily from 2026-09-09; earlier points are weekly, which dates a spike to within a week. Peak probability 99.7% on 2026-06-20.
Check whether a specific version is affected →
What each source publishes about which product versions carry this vulnerability, kept as written rather than merged. Absence here means no source has published applicability data, not that nothing is affected.
No mentions found in monitored research blogs or news feeds.
Coverage across public collections only: Nuclei and OpenVAS NVT (scan);
Snort and Suricata ET Open (network); Sigma and YARA (host/SIEM);
Metasploit, Exploit-DB and public GitHub repositories (exploit). Absence
here means nothing public was found, not that detection is impossible.
GitHub PoC repositories are collected automatically by
PoC-in-GitHub (CC0) and are not vetted:
some are fakes and some are malware. Treat them as evidence that code was
published, not as code to run.
OpenVAS coverage derives from the Greenbone Community Feed, made available
under the Open Database License (ODbL) v1.0;
its individual Vulnerability Tests are licensed
GNU GPL v2.
Defensive techniques inferred by MITRE D3FEND from the underlying weakness (CWE-20) — general hardening and detection guidance for this weakness class, not a vendor patch for this specific CVE.
| Source | Date | Record |
|---|---|---|
| CISA KEV | 2023-10-05 | source record → |
| CISA Vulnrichment | 2024-09-13 | source record → |
| Date | Advisory | Issuer |
|---|---|---|
| 2026-08-26 | Joint CSA: China-Linked Hacking Group QTFY Targets Military and Critical Infrastructure with Malicious Distributed Systems | NSA |
| 2024-11-12 | 2023 Top Routinely Exploited Vulnerabilities | CISA |
| 2024-09-18 | People's Republic of China-Linked Actors Compromise Routers and IoT Devices for Botnet Operations | FBI |
| 2024-08-29 | #StopRansomware: RansomHub Ransomware | CISA |
No exploit-tool sightings recorded for this CVE.
Evidence tiers are explained on the About page — a merged Metasploit module is far stronger evidence than a distro package mention.
CVE.org record → NVD entry → CISA KEV catalog → FortiGuard Labs → Rapid7 AttackerKB →