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Severity across 3 analyzed records
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As of 09/18/2026, within CyStack's analyzed data, Mediawiki - CheckUser extension has 0 security vulnerabilities published in the last 90 days. Of these, 0 are rated High or Critical. None of these vulnerabilities is listed in the CISA KEV catalog. CyStack recommends that organizations and individual users remediate applicable vulnerabilities as soon as possible.
CyStack does not yet have sufficient official-source data to identify the latest version of Mediawiki - CheckUser extension and determine which vulnerabilities affect that version.
CyStack VulnScan continuously discovers assets, validates vulnerabilities, and helps security teams prioritize remediation across the organization.
Explore CyStack VulnScan| Vulnerability | Exploitation status | Fix | Published | Severity |
|---|---|---|---|---|
CVE-2025-53479CheckUser: Reflected Cross-Site Scripting (XSS) in Special:CheckUser via unsanitized internationalized message | Exploitation statusPublic exploit | FixYes | Published07/08/2025 | SeverityMedium |
CVE-2025-53480CheckUser: Reflected Cross-Site Scripting (XSS) in Special:Investigate (Account information tab) via unsanitized i18n messages | Exploitation statusNot known exploited | FixYes | Published07/08/2025 | SeverityMedium |
CVE-2025-53478CheckUser: Reflected Cross-Site Scripting (XSS) in Special:Investigate via unsanitized i18n messages | Exploitation statusNot known exploited | FixYes | Published07/07/2025 | SeverityMedium |
