vulnerability
MediaWiki: Allocation of Resources Without Limits or Throttling (CVE-2022-34750)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:N/I:N/A:P) | Jun 28, 2022 | Jul 11, 2022 | Apr 7, 2026 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
Jun 28, 2022
Added
Jul 11, 2022
Modified
Apr 7, 2026
Description
An issue was discovered in MediaWiki through 1.38.1. The lemma length of a Wikibase lexeme is currently capped at a thousand characters. Unfortunately, this length is not validated, allowing much larger lexemes to be created, which introduces various denial-of-service attack vectors within the Wikibase and WikibaseLexeme extensions. This is related to Special:NewLexeme and Special:NewProperty.
Solution
mediawiki-upgrade-latest
References
- CVE-2022-34750
- https://attackerkb.com/topics/CVE-2022-34750
- CWE-770
- EUVD-EUVD-2022-37698
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-37698
- https://gerrit.wikimedia.org/r/q/I8171bfef73e525d73efa60b407ce147130ea4742
- https://gerrit.wikimedia.org/r/q/Id89a9b08e40f075d2d422cafd03668dff3ce7fc9
- https://phabricator.wikimedia.org/T308659
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