Vulnerability in Atlassian Confluence Data Center
CVE-2022-26138
The Atlassian Questions For Confluence app for Confluence Server and Data Center creates a Confluence user account in the confluence-users group with the username disabledsystemuser and a hardcoded password. A remote, unauthenticated attacker with knowledge of the hardcoded password could exploit this to log into Confluence and access all content accessible to users in the confluence-users group. This user account is created when installing versions 2.7.34, 2.7.35, and 3.0.2 of the app.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.982 (99.9th percentile), scored .
Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 99.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.982 · newest: 0.982 · change: +0.001
Affected products
- Atlassian Confluence Data Center
- Atlassian Confluence Server
- Atlassian Questions For Confluence — versions 2.7.34, 2.7.35, 3.0.2
- Atlassian Questions For Confluence — versions 2.7.34, 2.7.35, 3.0.2
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: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- jira.atlassian.com/browse/CONFSERVER-79483 (Patch, Issue Tracking, Vendor Advisory)
- confluence.atlassian.com/doc/confluence-security-advisory-2022-07-20-1142446709… (Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2022-26138?
- CVE-2022-26138 is a critical-severity vulnerability in Atlassian Confluence Data Center, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2022-07-20.
- How severe is CVE-2022-26138?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2022-26138 known to be exploited?
- Yes. CVE-2022-26138 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-07-29), indicating it is being actively exploited. 31 public proof-of-concept repositories are indexed.