PT-2021-23413 · Mediawiki+1 · Mediawiki+1

Cdanis + 1 · Published 2021-10-01 · Updated 2025-10-14 · CVE-2021-41800

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions MediaWiki versions prior to 1.36.2

Description The issue allows for a denial of service due to resource consumption caused by lengthy query processing time. Visiting Special:Contributions can sometimes result in a long running SQL query because PoolCounter protection is mishandled.

Recommendations For MediaWiki versions prior to 1.36.2, update to version 1.36.2 or later to resolve the issue. As a temporary workaround, consider restricting access to the Special:Contributions page to minimize the risk of exploitation.

Fix

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

ALT-PU-2021-3561

ALT-PU-2022-1199

BIT-MEDIAWIKI-2021-41800

CVE-2021-41800

DSA-4979-1

GHSA-C8WV-QWWC-6J73

MGASA-2021-0477

Affected Products

Alt Linux

Mediawiki

References · 30

• https://github.com/wikimedia/mediawiki/commit/781caf83dba90c18349f930bbaaa0e89f003f874 · Patch
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/MDBPECBWN6LWNSWIQMVXK6PP4YFEUYHA · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CJDYJQWT43GBD6GNQ4OW7JOZ6WQ6DZTN · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/QNEAI2T3Y65I55ZB6UE6RMC662RZTGRX · Vendor Advisory
• https://debian.org/security/2021/dsa-4979 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-41800 · Security Note
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MDBPECBWN6LWNSWIQMVXK6PP4YFEUYHA · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-41800 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/thread/QNEAI2T3Y65I55ZB6UE6RMC662RZTGRX · Vendor Advisory
• https://security.gentoo.org/glsa/202305-24 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-41800 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QNEAI2T3Y65I55ZB6UE6RMC662RZTGRX · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-41800 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2021-0477 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-41800 · Vendor Advisory