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CVE-2021-30159

Published: 9 April 2021

An issue was discovered in MediaWiki before 1.31.12 and 1.32.x through 1.35.x before 1.35.2. Users can bypass intended restrictions on deleting pages in certain "fast double move" situations. MovePage::isValidMoveTarget() uses FOR UPDATE, but it's only called if Title::getArticleID() returns non-zero with no special flags. Next, MovePage::moveToInternal() will delete the page if getArticleID(READ_LATEST) is non-zero. Therefore, if the page is missing in the replica DB, isValidMove() will return true, and then moveToInternal() will unconditionally delete the page if it can be found in the master.

Priority

Medium

CVSS 3 base score: 4.3

Status

Package Release Status
mediawiki
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code not present)
focal Needed

groovy Ignored
(reached end-of-life)
hirsute Ignored
(reached end-of-life)
impish Needed

jammy Needed

precise Does not exist

trusty Does not exist

upstream
Released (1:1.35.2-1)
xenial Does not exist