What’s Vulnerable › Vulnerabilities

CVE-2026-103443: API permits session-seeded javascript URL XSS

• Severity: low (CVSS 1.1 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-30 · updated 2026-09-30
• Weakness: CWE-80

Description

Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Collection (Book) extension allows XSS Targeting Non-Script Elements. This issue affects MediaWiki Collection (Book) extension: 1.46, 1.45, and 1.43.

Affected products

• The Wikimedia Foundation MediaWiki Collection (Book) extension: 1.46, 1.45, 1.43

References

• https://gerrit.wikimedia.org/r/q/I51d973d4ace99fb6e584296f296efb0ff50339ce
• https://phabricator.wikimedia.org/T435822

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