What’s Vulnerable › Vulnerabilities

CVE-2025-62697: Improperly sanitized style parameter in LanguageSelector

• Severity: high (CVSS 8.8 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-20 · updated 2026-10-08
• Weakness: CWE-74

Description

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') vulnerability in The Wikimedia Foundation Mediawiki - LanguageSelector Extension allows Code Injection.This issue affects Mediawiki - LanguageSelector Extension: from master before 1.39.

Affected products

• The Wikimedia Foundation Mediawiki - LanguageSelector Extension: from master before 1.39 — fixed in 1.39

How to fix

Upgrade to a fixed version: The Wikimedia Foundation Mediawiki - LanguageSelector Extension 1.39. Check the vendor advisory for mitigations.

References

• https://gerrit.wikimedia.org/r/q/I338288e756de4e58a3f1f02a9c205b37f4927935
• https://phabricator.wikimedia.org/T399724

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