RCE in Atlassian Confluence Data Center
CVE-2022-26134
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 from 1.3.0 before 7.4.17, from 7.13.0 before 7.13.7, from 7.14.0 before 7.14.3, from 7.15.0 before 7.15.2, from 7.16.0 before 7.16.4, from 7.17.0 before 7.17.4, and from 7.18.0 before 7.18.1.
Vulnerability class: Log4Shell (CVE-2021-44228)
EPSS: 1.000 (100.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Atlassian Confluence Data Center — versions next of 1.3.0, unspecified, 7.13.0
- Atlassian Confluence_data_center — versions 7.18.0
- Atlassian Confluence Server — versions next of 1.3.0, unspecified, 7.13.0
- Atlassian Confluence_server — versions 7.18.0
Weakness classification (CWE)
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: Immediately block all internet traffic to and from affected products AND apply the update per vendor instructions [https://confluence.atlassian.com/doc/confluence-security-advisory-2022-06-02-1130377146.html] OR remove the affected products by the due date on the right. Note: Once the update is successfully deployed, agencies can reassess the internet blocking rules.
Known ransomware campaign use: yes.
Public proof-of-concept exploits
References
- security@atlassian.com (Patch, x_refsource_MISC, Issue Tracking, Vendor Advisory)
- security@atlassian.com (VDB Entry, Third Party Advisory, x_refsource_MISC)
- security@atlassian.com (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
- security@atlassian.com (VDB Entry, Third Party Advisory, x_refsource_MISC)
- security@atlassian.com (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
- security@atlassian.com (x_refsource_MISC, Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2022-26134?
- CVE-2022-26134 is a critical-severity vulnerability in Atlassian Confluence Data Center, classified under Improper Neutralization of Special Elements used in an Expression Language Statement (Expression Language Injection). CVSS score: 9.8/10. Published 2022-06-03.
- How severe is CVE-2022-26134?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2022-26134 known to be exploited?
- Yes. CVE-2022-26134 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-06-02), indicating it is being actively exploited. 300 public proof-of-concept repositories are indexed.