CVE-2012-4382

Severity: medium (CVSS 4.9 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-10-19 · updated 2026-06-16
Weakness: CWE-200

Description

MediaWiki before 1.18.5, and 1.19.x before 1.19.2 does not properly protect user block metadata, which allows remote administrators to read a user block reason via a reblock attempt.

Affected products

Wikimedia Foundation MediaWiki: through 1.18.4; 1.19.0, 1.19.1

References

http://www.openwall.com/lists/oss-security/2012/08/31/10
http://www.openwall.com/lists/oss-security/2012/08/31/6
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=686330
https://lists.wikimedia.org/pipermail/mediawiki-announce/2012-August/000119.html
https://phabricator.wikimedia.org/T41823
http://www.openwall.com/lists/oss-security/2012/08/31/10
http://www.openwall.com/lists/oss-security/2012/08/31/6
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=686330
https://lists.wikimedia.org/pipermail/mediawiki-announce/2012-August/000119.html
https://phabricator.wikimedia.org/T41823

Get alerted when CVE-2012-4382 or the next vulnerability affects your stack