1.1

CVE-2025-61650: wikimedia foundation checkuser Cross-site Scripting

CVSS: 1.1v4.0LowDeferred
Published 03-02-2026Last modified 03-02-2026
Open JSON

Vulnerability summary

CVE-2025-61650 is a low (CVSS 1.1) Cross-site Scripting vulnerability in wikimedia foundation checkuser. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 19.9% of scored vulnerabilities.

Overall risk
4/100
0100
Minimal · default modelHow is this calculated?
CVSS score
1.1/10
010
Low · v4.0 (CVE.org)
EPSS score
0.29%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 03-02-2026
    PublishedVulnerability first disclosed.
  2. 03-02-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

+0.03 pp

From 0.26% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.29%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Wikimedia foundation1 product
  • checkuser< 795bf333272206a0189050d975e94b70eb7dc507

1 vendor · 1 product

References

1 links