Vulnerability CVE-2021-31547
Published: 2021-04-22

Description:
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.

Type:

CWE-668

 (Exposure of Resource to Wrong Sphere)

CVSS2 => (AV:N/AC:L/Au:S/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4/10
2.9/10
8/10
Exploit range
Attack complexity
Authentication
Remote
Low
Single time
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Mediawiki -> Mediawiki 

 References:
https://gerrit.wikimedia.org/r/q/I4900b1be73323599d74e3164447f81eded094d75
https://phabricator.wikimedia.org/T223654
https://gerrit.wikimedia.org/r/q/I3f7dbd8b873d411e37c8c3aac2339bf5ec36907d
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