CVE-2025-62652: the wikimedia foundation mediawiki webauthn extension Cross-site Scripting
CVSS: 5.9v4.0MediumDeferred
Published 17-10-2025Last modified 20-10-2025
Vulnerability summary
CVE-2025-62652 is a medium (CVSS 5.9) Cross-site Scripting vulnerability in the wikimedia foundation mediawiki webauthn extension. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 31.3% of scored vulnerabilities.
CVSS score
5.9/10
010
Medium · v4.0 (NVD)EPSS score
0.39%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 17-10-2025PublishedVulnerability first disclosed.
- 20-10-2025Last modifiedVulnerability information updated.
Description
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation MediaWiki WebAuthn extension allows Stored XSS.This issue affects MediaWiki WebAuthn extension: 1.39, 1.43, 1.44.
CVSS metrics
2 scores · 2 sources · 1 versionMedium 5.9Preferred score · NVD (NIST)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:C/RE:L/U:AmberSources2 sources · 5.8–5.9
- CVE.orgCNA5.8MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/AU:N/R:U/V:C/RE:L/U:AmberDiffers
EPSS trend
Probability
0.39%
Chance of exploitation in the next 30 days
Percentile
31%
Versus all other CVEs
30-day change
0.00 pp
From 0.39% on 21-09-2026
21-09-202621-10-2026
EPSS score0.39%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
The wikimedia foundation1 product
- mediawiki webauthn extension1.39 | 1.43 | 1.44
1 vendor · 1 product