CVE-2026-103439
LowCVSS 0.3Exploitation Probability (EPSS)
Low risk3th percentile - higher than 3% of all known CVEs
Summary
Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Wikbase extension allows Cross-Site Scripting (XSS). This issue affects MediaWiki Wikbase extension: 1.46, 1.45, and 1.43.
Risk Assessment
XSS may allow an attacker to execute arbitrary JavaScript in a victim's browser, potentially leading to session or data theft. The risk is particularly relevant for users with content editing privileges.
Recommendation
Update the Wikbase extension to a version containing the fix or disable it until the update is applied. Additionally, consider implementing input filtering mechanisms.
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Original NVD description (English source)
Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Wikbase extension allows Cross-Site Scripting (XSS). This issue affects MediaWiki Wikbase extension: 1.46, 1.45, and 1.43.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

