CVE-2026-125364
frab through 0.9.1 Privilege Escalation via conference_users_attributes in UsersController
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-269 |
| Vendor | frab |
| Product | frab |
| Published | Nov 9, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
frab / frab
0 ≤ 0.9.1
References
github.com: https://github.com/frab/frab/issues/1053 github.com: https://github.com/frab/frab github.com: https://github.com/frab/frab/blob/0.9.1/app/controllers/users_controller.rb#L51 github.com: https://github.com/frab/frab/commit/8d14d491ac73f2e19030e95a86b6575106270eeb vulncheck.com: https://www.vulncheck.com/advisories/frab-through-0.9.1-privilege-escalation-via-conference-users-attributes-in-userscontroller
Credits
George Chen