frab through 0.9.1 contains a privilege escalation vulnerability that allows authenticated crew users to grant themselves orga roles by…
CVE-2026-125364
frab through 0.9.1 contains a privilege escalation vulnerability that allows authenticated crew users to grant themselves orga roles by submitting unchecked nested conferenceusersattributes. Attackers can abuse UsersController#update or #create, which skip filterconferenceusers, to gain orga on any conference and fully manage its events, schedule, reviewers and crew.
Assessment
- CVSS
- 8.6 (v4.0)
- Severity
- High
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 9 November 2026
- Last updated
- 10 November 2026
- Assigner
- VulnCheck
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
At the source
References
- https://github.com/frab/frab/issues/1053
- https://github.com/frab/frab
- https://github.com/frab/frab/blob/0.9.1/app/controllers/users_controller.rb#L51
- https://github.com/frab/frab/commit/8d14d491ac73f2e19030e95a86b6575106270eeb
- https://www.vulncheck.com/advisories/frab-through-0.9.1-privilege-escalation-via-conference-users-attributes-in-userscontroller
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