An issue exists in MediaWiki prior to 1.31.12 and 1.32.x up to and including 1.35.x prior to 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.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
mediawiki mediawiki |
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debian debian linux 9.0 |
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debian debian linux 10.0 |
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fedoraproject fedora 33 |
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fedoraproject fedora 34 |
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