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Advisories

Vikunja through 2.4.0 Principal-Type Confusion via LinkSharing

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severity
high
date
Affecting

  • vikunja <= 2.4.0

CWE
  • CWE-639 Authorization Bypass Through User-Controlled Key
CVSS
7.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
manus-use
Description
Vikunja through 2.4.0 contains a principal-type confusion vulnerability where LinkSharing principals with id N are treated as user principals with users.id == N at three permission checks lacking type guards. Attackers with a link-share JWT can remove victims from teams, enumerate and delete victim bot users, or read team rosters by exploiting id collisions in the autoincrement space.

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