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Advisories

Semantic MediaWiki 3.0.0 before 7.3.1 Uncontrolled Recursion via Special:Ask

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Severity
high
Date
Affecting

  • SemanticMediaWiki >= 3.0.0, < 7.3.1

CWE
  • CWE-674 Uncontrolled Recursion
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
AlpetGexha
Description
Semantic MediaWiki 3.0.0 before 7.3.1 contains an uncontrolled recursion vulnerability in LegacyParser::getSubqueryDescription() that processes nested query tokens before depth limits apply. Unauthenticated attackers can submit deeply nested query elements to the action=ask API to consume substantial CPU and memory, tying up request workers.

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