Vulnerability Name:

CVE-2021-31547 (CCN-200573)

Assigned:2019-05-17
Published:2019-05-17
Updated:2022-07-12
Summary:An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. Its AbuseFilterCheckMatch API reveals suppressed edits and usernames to unprivileged users through the iteration of crafted AbuseFilter rules.
CVSS v3 Severity:4.3 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
3.8 Low (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): None
4.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
3.8 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:4.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
4.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-200
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2021-31547

Source: XF
Type: UNKNOWN
mediawiki-cve202131547-info-disc(200573)

Source: MISC
Type: Issue Tracking, Third Party Advisory
https://gerrit.wikimedia.org/r/q/I3f7dbd8b873d411e37c8c3aac2339bf5ec36907d

Source: MISC
Type: Issue Tracking, Third Party Advisory
https://gerrit.wikimedia.org/r/q/I4900b1be73323599d74e3164447f81eded094d75

Source: CCN
Type: Phabricator T223654
AbuseFilterCheckMatch API reveals suppressed edits and usernames

Source: MISC
Type: Third Party Advisory
https://phabricator.wikimedia.org/T223654

Vulnerable Configuration:Configuration 1:
  • cpe:/a:mediawiki:mediawiki:*:*:*:*:*:*:*:* (Version <= 1.35.2)

    • Configuration CCN 1:
  • cpe:/a:mediawiki:mediawiki:1.35.2:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    mediawiki mediawiki *
    mediawiki mediawiki 1.35.2