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ExploitedIn CISA KEVFix available

CVE-2022-26138

Exploitation confirmed. First attested on 2022-07-29 by CISA-ADP, CISA KEV, GCVE · kevintel, GCVE · shadowserver.

  • Published2022-07-20
  • WeaknessCWE-798

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2022-07-2018:15CVE publishedNVD
  2. 2022-07-29Added to the CISA KEV catalogCISA KEV
  3. 2022-07-29Listed as exploited by GCVEGCVE
  4. 2022-07-29Exploitation first reportedCISA KEV
  5. 2025-01-2821:47SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-26138?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-26138?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Atlassian questions for confluenceversion to verify
BranchAffectedFixed in
2.7= 2.7.34no fix published
2.7= 2.7.35no fix published
3.0= 3.0.2no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As atlassian, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Atlassian Questions For Confluence
    Affected
    • = 2.7.34no fix stated
    • = 2.7.35no fix stated
    • = 3.0.2no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2022-07-20

Fix

  1. CISA’s required action: Apply updates per vendor instructions.due 2022-08-19

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
4 repositories, unverifiedalcaparra/CVE-2022-26138Vulnmachines/Confluence-Question-CVE-2022-26138-z92g/CVE-2022-26138shavchen/CVE-2022-26138
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2022-07-29
Patch Due Date
2022-08-19
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2022-07-20
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-23xf-wg9r-49fr

Frequently asked questions

What is 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.

Is CVE-2022-26138 actively exploited?

Yes. CVE-2022-26138 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-08-19.

What is the CVSS score for CVE-2022-26138?

CVE-2022-26138 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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