CVE Vulnerability

CVE-2021-31553

An issue was discovered in the CheckUser extension for MediaWiki through 1.35.2. MediaWiki usernames with trailing whitespace could be stored in the cu_log database table such that denial of service occurred for certain CheckUser extension pages and functionality. For example, the attacker could turn off Special:CheckUserLog and thus interfere with usage tracking.

6.4 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 4.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

6.5 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666963 Issue Tracking Third Party Advisory
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666964 Issue Tracking Third Party Advisory
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667027 Issue Tracking Third Party Advisory
https://phabricator.wikimedia.org/T275669 Third Party Advisory
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667025 Issue Tracking Third Party Advisory
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667023 Issue Tracking Third Party Advisory
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667024 Issue Tracking Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
Information

Published : 2021-04-22 03:15

Updated : 2021-04-22 08:14

NVD link : CVE-2021-31553

Mitre link : CVE-2021-31553

Products Affected
No products.
CWE
CWE-428