CVE-2019-12472: MediaWiki Incorrect Access Control vulnerability

May 24, 2022 (updated May 15, 2024)

An Incorrect Access Control vulnerability was found in Wikimedia MediaWiki 1.18.0 through 1.32.1. It is possible to bypass the limits on IP range blocks ($wgBlockCIDRLimit) by using the API. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

References

github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2019-12472.yaml
github.com/advisories/GHSA-7mqg-5fgh-xh4r
github.com/wikimedia/mediawiki
lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.html
nvd.nist.gov/vuln/detail/CVE-2019-12472
phabricator.wikimedia.org/T199540

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