Exposure of Sensitive System Information to an Unauthorized Control Sphere Affecting mediawiki/core package, versions <1.39.14>=1.40.0-rc.0, <1.43.4>=1.44.0-rc.0, <1.44.1
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-15219372
- published5 Feb 2026
- disclosed3 Feb 2026
- creditUnknown
Introduced: 3 Feb 2026
CVE-2025-61646 (opens in a new tab)How to fix?
Upgrade mediawiki/core to version 1.39.14, 1.43.4, 1.44.1 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 Exposure of Sensitive System Information to an Unauthorized Control Sphere via the recentChangesBlock() function. An attacker can disclose the identities of authors whose authorship was intended to be hidden by accessing watchlist group mode.