MediaWiki ExternalGuidance Stored XSS before v1.39
CVE-2025-62698 Published on October 20, 2025
Stored XSS through system messages in ExternalGuidance
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation Mediawiki - ExternalGuidance allows Stored XSS.This issue affects Mediawiki - ExternalGuidance: from master before 1.39.
Vulnerability Analysis
CVE-2025-62698 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2025-62698 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2025-62698
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Affected Versions
The Wikimedia Foundation Mediawiki - ExternalGuidance:- Version master and below 1.39 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.