CVE-2026-125364
frab through 0.9.1 Privilege Escalation via conference_users_attributes in UsersController
frab through 0.9.1 contains a privilege escalation vulnerability that allows authenticated crew users to grant themselves orga roles by submitting unchecked nested conference_users_attributes. Attackers can abuse UsersController#update or #create, which skip filter_conference_users, to gain orga on any conference and fully manage its events, schedule, reviewers and crew.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| frab frab |
≥ 0; ≤ 0.9.1 (affected, semver)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.6 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 8.1 high |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/frab/frab/issues/1053CNA: VulnCheck · issue-tracking
- https://github.com/frab/frabCNA: VulnCheck · product
- https://github.com/frab/frab/blob/0.9.1/app/controllers/users_controller.rb#L51CNA: VulnCheck · technical-description
- https://github.com/frab/frab/commit/8d14d491ac73f2e19030e95a86b6575106270eebCNA: VulnCheck · patch
- https://www.vulncheck.com/advisories/frab-through-0.9.1-privilege-escalation-via-conference-users-attributes-in-userscontrollerCNA: VulnCheck · third-party-advisory
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