In MediaWiki through 1.33.0, Special:Redirect allows information disclosure of suppressed usernames via a User ID Lookup.

MediaWiki reports :

Security fixes : T230402, CVE-2019-16738 SECURITY: Add permission check for suppressed account to Special:Redirect.

== Security fixes ==

  - (T230402, CVE-2019-16738) SECURITY: Add permission check     for suppressed account to Special:Redirect.

== Links to all mentioned tasks ==

  - https://phabricator.wikimedia.org/T230402

  - https://phabricator.wikimedia.org/T227662

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

It was discovered that the Special:Redirect functionality of MediaWiki, a website engine for collaborative work, could expose suppressed user names, resulting in an information leak.

== Security fixes ==

  - (T230402, CVE-2019-16738) SECURITY: Add permission check     for suppressed account to Special:Redirect.

== Links to all mentioned tasks ==

- https://phabricator.wikimedia.org/T230402

- https://phabricator.wikimedia.org/T227662

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
130495	FreeBSD : mediawiki -- multiple vulnerabilities (c32285fe-fde4-11e9-9525-000c29c4dc65)	Nessus	FreeBSD Local Security Checks	medium
130295	Fedora 31 : mediawiki (2019-3ba38e1cdb)	Nessus	Fedora Local Security Checks	medium
130073	Debian DSA-4545-1 : mediawiki - security update	Nessus	Debian Local Security Checks	medium
130037	Fedora 30 : mediawiki (2019-c4cdd73c74)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2019-16738

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Tenable Plugins

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