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.
Details
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| mediawiki | — | — |
References
Similar Threats
- Critical CVE-2020-10534
- High CVE-2020-25869
- Medium CVE-2020-26120
- Medium CVE-2020-27621
- Medium CVE-2020-27957
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