vulnerability
MediaWiki: CVE-2021-31552: Incorrect Authorization
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:S/C:P/I:P/A:N) | Apr 22, 2021 | Apr 26, 2021 | May 6, 2026 |
Severity
5
CVSS
(AV:N/AC:L/Au:S/C:P/I:P/A:N)
Published
Apr 22, 2021
Added
Apr 26, 2021
Modified
May 6, 2026
Description
An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. It incorrectly executed certain rules related to blocking accounts after account creation. Such rules would allow for user accounts to be created while blocking only the IP address used to create an account (and not the user account itself). Such rules could also be used by a nefarious, unprivileged user to catalog and enumerate any number of IP addresses related to these account creations.
Solution
mediawiki-upgrade-latest
Rapid7 Labs
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