Vulnerability in Atlassian Confluence Data Center
CVE-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…
EPSS: 0.944 (100.0th percentile) — read the EPSS interpretation.
Affected products
- Atlassian Confluence Data Center — versions unspecified, 6.14.0, 7.5.0
- Atlassian Confluence Server — versions unspecified, 6.14.0, 7.5.0
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Known ransomware campaign use: yes.
Public proof-of-concept exploits
References
- jira.atlassian.com/browse/CONFSERVER-67940 (x_refsource_MISC)
- packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Inject… (x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-26084?
- CVE-2021-26084 is a vulnerability in Atlassian Confluence Data Center. Published 2021-08-30.
- Is CVE-2021-26084 known to be exploited?
- Yes. CVE-2021-26084 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 215 public proof-of-concept repositories are indexed.