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Advisories

Open WebUI 0.11.0 before 0.11.4 Improper Authorization via Chat Fork Endpoint

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severity
medium
date
Affecting

  • open-webui >= 0.11.0, < 0.11.4

CWE
  • CWE-862 Missing Authorization
CVSS
5.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Credit
avrlab233, Classic298
Description
Open WebUI from 0.11.0 before 0.11.4 contains an improper authorization vulnerability in the chat fork handler, which places forked chats in the source chat's folder without checking folder write access. Shared folder members downgraded to read-only can call POST /api/v1/chats/{id}/fork on chats they created there while they had write access, inserting attacker-controlled chats visible to the folder owner and members.

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