Description

While assignment of a user to a team (bracket) in CTFd should be possible only once, at the registration, a flaw in logic implementation allows an authenticated user to reset it's bracket and then pick a new one, joining another team while a competition is already ongoing.
This issue impacts releases from 3.7.0 up to 3.7.4 and was addressed by pull request 2636 https://github.com/CTFd/CTFd/pull/2636  included in 3.7.5 release.

Classification

CVE ID: CVE-2024-11716

CVSS Base Severity: MEDIUM

CVSS Base Score: 5.3

Affected Products

Vendor: CTFd

Product: CTFd

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.05% (probability of being exploited)

EPSS Percentile: 17.83% (scored less or equal to compared to others)

EPSS Date: 2025-02-04 (when was this score calculated)

References

https://github.com/CTFd/CTFd/pull/2636
https://cert.pl/en/posts/2025/01/CVE-2024-11716
https://ctfd.io/
https://blog.ctfd.io/ctfd-3-7-5/
https://seclists.org/fulldisclosure/2024/Dec/21

Timeline