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CVE-2025-62656

GlobalBlocking Special:GlobalBlockList vulnerable to message key stored XSS

MEDIUM
5.8
CVSS Score
Published: October 20, 2025 at 08:15 PM UTC
Updated: October 8, 2026 at 10:10 PM UTC
1 product affected across 1 vendorGlobalBlocking

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Severity
MEDIUM5.8
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation MediaWiki GlobalBlocking extension allows Stored XSS.This issue affects MediaWiki GlobalBlocking extension: 1.43, 1.44.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://phabricator.wikimedia.org/T403291

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.8MEDIUMwikimedia-foundation
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-79

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