CVE-2021-41800

MEDIUM

MediaWiki < 1.36.2 - Denial of Service via Special:Contributions PoolCounter Mishandling

Title source: llm

Description

MediaWiki before 1.36.2 allows a denial of service (resource consumption because of lengthy query processing time). Visiting Special:Contributions can sometimes result in a long running SQL query because PoolCounter protection is mishandled.

References (7)

Core 7

Core References

Mailing List, Third Party Advisory vendor-advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QNEAI2T3Y65I55ZB6UE6RMC662RZTGRX/

Mailing List, Third Party Advisory vendor-advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CJDYJQWT43GBD6GNQ4OW7JOZ6WQ6DZTN/

Mailing List, Third Party Advisory vendor-advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MDBPECBWN6LWNSWIQMVXK6PP4YFEUYHA/

Third Party Advisory vendor-advisory

https://security.gentoo.org/glsa/202305-24

Patch, Third Party Advisory

https://github.com/wikimedia/mediawiki/commit/781caf83dba90c18349f930bbaaa0e89f003f874

View Patch ZIP pw:eip

Permissions Required

https://phabricator.wikimedia.org/T284419

Third Party Advisory

https://lists.wikimedia.org/hyperkitty/list/wikitech-l%40lists.wikimedia.org/thread/2IFS5CM2YV4VMSODPX3J2LFHKSEWVFV5/

Scores

CVSS v3 5.3

EPSS 0.0069

EPSS Percentile 72.0%

Attack Vector NETWORK

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

Details

CWE

CWE-770

Status published

Products (5)

fedoraproject/fedora 33

fedoraproject/fedora 34

fedoraproject/fedora 35

mediawiki/core 0 - 1.36.2Packagist

mediawiki/mediawiki < 1.36.2

Published Oct 11, 2021

Tracked Since Feb 18, 2026