Vulnerability CVE-2021-31545
Published: 2021-04-22

Description:
An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The page_recent_contributors leaked the existence of certain deleted MediaWiki usernames, related to rev_deleted.

Type:

CWE-200

 (Information Exposure)

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

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Mediawiki -> Mediawiki 

 References:
https://phabricator.wikimedia.org/T71367
https://gerrit.wikimedia.org/r/q/I8d5ed9ca84282ee50832035af86123633fc88293
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