CVE-2021-35197 Information

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Description

In MediaWiki before 1.31.15 1.32.x through 1.35.x before 1.35.3 and 1.36.x before 1.36.1 bots have certain unintended API access. When a bot account has a \sitewide block\ applied it is able to still \purge\ pages through the MediaWiki Action API (which a \sitewide block\ should have prevented).

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

https://lists.wikimedia.org/hyperkitty/list/[email protected]/thread/YR3X4L2CPSEJVSY543AWEO65TD6APXHP/ https://phabricator.wikimedia.org/T280226 https://security.gentoo.org/glsa/202107-40 https://www.debian.org/security/2021/dsa-4979 https://lists.debian.org/debian-lts-announce/2021/10/msg00003.html https://lists.fedoraproject.org/archives/list/[email protected]/message/QNEAI2T3Y65I55ZB6UE6RMC662RZTGRX/ https://lists.fedoraproject.org/archives/list/[email protected]/message/CJDYJQWT43GBD6GNQ4OW7JOZ6WQ6DZTN/ https://lists.fedoraproject.org/archives/list/[email protected]/message/MDBPECBWN6LWNSWIQMVXK6PP4YFEUYHA/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.5