CVE-2021-31553

CVSS V2 Medium 6.4 CVSS V3 Medium 6.5
Description
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.
Overview
  • CVE ID
  • CVE-2021-31553
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-04-22T03:15:08
  • Last Modified Date
  • 2021-04-22T20:14:45
Weakness Enumerations
CWE URL
CWE-428 http://cwe.mitre.org/data/definitions/428.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* 1 OR 1.35.2
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:P/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • PARTIAL
  • Base Score
  • 6.4
  • Severity
  • MEDIUM
  • Exploitability Score
  • 10
  • Impact Score
  • 4.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • LOW
  • Base Score
  • 6.5
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 3.9
  • Impact Score
  • 2.5
References
Reference URL Reference Tags
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
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-31553
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31553
History
Created Old Value New Value Data Type Notes
2022-05-10 07:14:43 Added to TrackCVE
2022-12-06 02:15:33 2021-04-22T03:15Z 2021-04-22T03:15:08 CVE Published Date updated
2022-12-06 02:15:33 2021-04-22T20:14:45 CVE Modified Date updated
2022-12-06 02:15:33 Analyzed Vulnerability Status updated