Bypassing IP Range Blocks via API in Wikimedia MediaWiki

CVE-2019-12472 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:P/A:N

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.

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