What is CVE-2025-61648?

CVE-2025-61648 is a medium-severity vulnerability in Mediawiki Checkuser, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-02-03.

How severe is CVE-2025-61648?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Mediawiki Checkuser

CVE-2025-61648

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 modules/ext.CheckUser.TempAccounts/components/…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (4.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Mediawiki Checkuser
Wikimedia Foundation Checkuser

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Permissions Required)

Frequently asked questions

What is CVE-2025-61648?: CVE-2025-61648 is a medium-severity vulnerability in Mediawiki Checkuser, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-02-03.
How severe is CVE-2025-61648?: Medium severity. CVSS v3 base score is 6.1 out of 10.