Actively exploited · CISA KEV · NVD published 2021-08-30
Actively exploitedCVE-2021-26084
In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are before version 6.13.23, from version 6.14.0 before 7.4.11, from version 7.5.0 before 7.11.6, and from version 7.12.0 before 7.12.5.
- First PoC
- 1694 days →Metasploit
- 178 days →First cited attacker
Signals
- Exploited in the wild
- Yesadded 2021-11-03 · due 2021-11-17 · known ransomware use. An observation, not a forecast.
- EPSS · 30-day forecast
- 100.0%Chance of exploitation in the next 30 days, 100th percentile of all CVEs. A forecast; KEV outranks it.
- CVSS · NVD · CRITICAL
- 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Internet exposure
- not stated by sourcesNo exposure census on this CVE's dispatches.
Exploits
3 known · links onlyMetasploit1
This module exploits an OGNL injection in Atlassian Confluence's WebWork component to execute commands as the Tomcat user.
ruby · seen 2026-10-18
Exploit-DB1
created 2021-09-01
Nuclei1
Confluence Server and Data Center contain an OGNL injection vulnerability that could allow an authenticated user, and in some instances an unauthenticated user, to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are before version 6.13.23, from version 6.14.0 before 7.4.11, from version 7.5.0 before 7.11.6, and from version 7.12.0 before 7.12.5. The vulnerable endpoints can be accessed by a non-administrator user or unauthenticated user if 'Allow peo
yaml · seen 2026-10-18
On the wire
0 dispatchesNo dispatch on our wire has named this CVE yet.
Watch this one?
KEV additions reach Telegram and the KEV-only RSS as they land.
Check your stack
Paste what you run: the CVEs exploited in the wild against it, and who is cited as exploiting them, with the report.
Stack checkNo key. No signup.