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Vulnerable Software

Vulnerability Details CVE-2021-30159

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.006
EPSS Ranking 67.5%
CVSS Severity
CVSS v3 Score 4.3
CVSS v2 Score 4.0
References
Products affected by CVE-2021-30159


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