9.8

CVE-2022-26138: Atlassian Questions For Confluence App Hard-coded Credentials Vulnerability

KEV
Analyzed
Published 20-07-2022Last modified 12-01-2026

Vulnerability summary

CVE-2022-26138 is a critical (CVSS 9.8) Use of Hard-coded Credentials vulnerability in Atlassian Confluence. It is known to be exploited: CISA lists it, first on 29-07-2022. EPSS estimates a 98.24% chance of exploitation in the next 30 days, higher than 99.9% of scored vulnerabilities.

Priority
Act nowlisted as exploited

Listed as exploited by CISA (29-07-2022)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
98.24%
0%100%
Critical · +0.07 pp in 30 days
KEVExploited in the wildCritical · listed in 1 catalog
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 20-07-2022
    PublishedVulnerability first disclosed.
  2. 29-07-2022
    Added to CISA KEVExploitedAtlassian Questions For Confluence App Hard-coded Credentials Vulnerability
  3. 19-08-2022
    CISA remediation dueDeadline passedApply updates per vendor instructions.
  4. 12-01-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

98.24%

Chance of exploitation in the next 30 days

Percentile

100%

Versus all other CVEs

30-day change

Increase +0.07 pp

From 98.17% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEVListed
Added
29-07-2022
Federal due date
19-08-2022
ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

CISA required action

Apply updates per vendor instructions. confluence.atlassian.com/doc/questions-for-confluence-security-advisory-2022-07-20-1142446709.html nvd.nist.gov/vuln/detail/CVE-2022-26138

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Atlassian1 product

1 vendor · 1 product

References

3 links