An issue exists in MediaWiki up to and including 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.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
mediawiki mediawiki |
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