Information Exposure Affecting mediawiki/core package, versions <1.43.7>=1.44.0-rc.0, <1.44.4>=1.45.0-rc.0, <1.45.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-MEDIAWIKICORE-16642089
- published12 May 2026
- disclosed11 May 2026
- creditUnknown
Introduced: 11 May 2026
CVE-2026-34092 (opens in a new tab)How to fix?
Upgrade mediawiki/core to version 1.43.7, 1.44.4, 1.45.2 or higher.
Overview
mediawiki/core is a Free software wiki application developed by the Wikimedia Foundation and others.
Note: This package is not maintained on Packagist anymore, but newer releases exist.
Affected versions of this package are vulnerable to Information Exposure via the includes/Skin/Skin.Php file, where block UI elements in the 'tools'-sidebar reveal the presence of an autoblocked IP. An attacker can infer sensitive information about blocked users by viewing the sidebar elements.