Checkuser
Vendor:
First CVE: Apr 13, 2015 · Active for 11 years
8
Total CVEs
More Total CVEs than 85% of tracked products
2.0
Avg CVEs / Year
Higher CVE frequency than 60% of tracked products
6.4
Avg CVSS
Higher Avg CVSS than 28% of tracked products
0.0%
KEV Rate
Bottom 1%
Trends Over Time
The number and severity of CVEs published that impact Checkuser over time
Volume of CVEsAvg CVSS Base Score
First CVE
Apr 13, 2015
11 years ago
Most Recent CVE
May 11, 2026
74 days ago
CVE Severity & Scoring
Checkuser8 CVEs
75%
25%
All CVEs352,231 CVEs
45%
40%
11%
MediumHigh
Attack Vector
Local0 (0.0%)
Network7 (87.5%)
Unknown1 (12.5%)
Physical0 (0.0%)
Adjacent Network0 (0.0%)
Attack Complexity
Low7 (87.5%)
High0 (0.0%)
Unknown1 (12.5%)
User Interaction
None4 (50.0%)
Unknown1 (12.5%)
Required3 (37.5%)
Privileges Required
Low2 (25.0%)
High0 (0.0%)
None5 (62.5%)
Unknown1 (12.5%)
Top CVEs
Signals from CVEs in this product scope (8 CVEs).
8 CVEs · Highest risk first
| CVE | Published | CVSS | Risk | KEV | Exploit |
|---|---|---|---|---|---|
CVE-2025-67478HIGH Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files includes/Mail/UserMailer.Php.
This issue affects CheckUser: from * before 1.39 | Feb 3, 2026 | 8.8 | 31 | NO | NO |
CVE-2026-34090HIGH Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation CheckUser.
This issue affects CheckUser: from 1.45.0 before 1.45.2. | May 11, 2026 | 7.5 | 28 | NO | NO |
CVE-2025-61651MEDIUM Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with p | Feb 3, 2026 | 6.1 | 21 | NO | NO |
CVE-2025-61648MEDIUM Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with p | Feb 3, 2026 | 6.1 | 21 | NO | NO |
CVE-2019-18611MEDIUM An issue was discovered in the CheckUser extension through 1.34 for MediaWiki. Certain sensitive information within oversighted edit summaries made available via the MediaWiki API | Oct 29, 2019 | 6.5 | 21 | NO | NO |
CVE-2019-16529MEDIUM An issue was discovered in the CheckUser extension through 1.35.0 for MediaWiki. Oversighted edit summaries are still visible in CheckUser results in violation of MediaWiki's permi | Mar 19, 2020 | 5.3 | 20 | NO | NO |
CVE-2015-2940MEDIUM Cross-site request forgery (CSRF) vulnerability in the CheckUser extension for MediaWiki allows remote attackers to hijack the authentication of certain users for requests that ret | Apr 13, 2015 | 6.8 | 18 | NO | NO |
CVE-2025-61658MEDIUM Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/GlobalContributions/GlobalContributionsPager.Php.
This issue affects Check | Feb 3, 2026 | 4.3 | 17 | NO | NO |
Exploit Exposure
Signals from CVEs in this product scope (8 CVEs).
CISA KEV
0 CVEs
0.0% of CVEs· Bottom 1%
Metasploit
0 CVEs
0.0% of CVEs· Bottom 1%
Nuclei
0 CVEs
0.0% of CVEs· Bottom 1%
ExploitDB
0 CVEs
0.0% of CVEs· Bottom 1%
Social Chatter
Signals from CVEs in this product scope (8 CVEs).
Media Mentions
Signals from CVEs in this product scope (8 CVEs).
Top CNAs Publishing CVEs For Checkuser
Top CWEs
Versions
| Version | CVE Count | Avg CVSS | Avg EPSS | KEV | Exploits |
|---|---|---|---|---|---|
| 1.44.0 | 2 | 6.5 | 0.3% | 0 | 0 |