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Vulnerabilities

Vulnerability · CVE-2025-61650

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser.

Published Feb 3, 2026 · catalog updated Feb 3, 2026 · Wikimedia Foundation CheckUser

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-61650. EPSS is 0.29%. Act only if a listed version of Wikimedia Foundation CheckUser is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Low1.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.29%
Remediation
Version ranges on file
Affected products
vendor Wikimedia Foundation CheckUser * <795bf333272206a0189050d975e94b70eb7dc507

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/Services/CheckUserUserInfoCardService.Php. This issue affects CheckUser: from * before 795bf333272206a0189050d975e94b70eb7dc507.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Wikimedia Foundation CheckUser * <795bf333272206a0189050d975e94b70eb7dc507* <795bf333272206a0189050d975e94b70eb7dc507

How to fix CVE-2025-61650

  • Upgrade

    CVE-2025-61650 lists a fix boundary at 795bf333272206a0189050d975e94b70eb7dc507. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in * <795bf333272206a0189050d975e94b70eb7dc507

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-61650. EPSS is 0.29%. Act only if a listed version of Wikimedia Foundation CheckUser is installed.

Which versions are affected?

Compare what you have installed with Wikimedia Foundation CheckUser * <795bf333272206a0189050d975e94b70eb7dc507 * <795bf333272206a0189050d975e94b70eb7dc507. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.29%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 3, 2026 · EUVD

    Detected

    Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/Services/CheckUserUserInfoCardService.Php. This issue affects CheckUser: from * before 795bf333272206a0189050d975e94b70eb7dc507.

  2. Feb 3, 2026 · EUVD

    Updated

    Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/Services/CheckUserUserInfoCardService.Php. This issue affects CheckUser: from * before 795bf333272206a0189050d975e94b70eb7dc507.

Sources

  • CVE.orgVulnerability recordCVE-2025-61650

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-61650

    30-day exploitation probability 0.29%

    first.org
  • EUVDVulnerability recordEUVD-2025-206642

    Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/Services/CheckUserUserInfoCardService.Php. This issue affects CheckUser: from * bef

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 4, 2026
  • CVE.orgNov 4, 2026
  • EUVDNov 4, 2026