Logic Flaw in CTFd Allows Team Reassignment During Ongoing Competitions
CVE-2024-11716

5.3MEDIUM

Key Information:

Vendor
Ctfd
Status
Ctfd
Vendor
CVE Published:
2 January 2025

Badges

👾 Exploit Exists🟡 Public PoC

Summary

A vulnerability in CTFd allows authenticated users to change their assigned team during an ongoing competition due to flawed logic in user assignment. This flaw permits a user to reset their bracket after initial registration, enabling them to switch teams and potentially disrupt competitive integrity. The issue affects versions 3.7.0 through 3.7.4. The vulnerability was addressed in release 3.7.5 with the incorporation of a fix from pull request 2636.

Affected Version(s)

CTFd 3.7.0 <= 3.7.4

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2024-11716 - Proof of Concept

References

https://github.com/CTFd/CTFd/pull/2636
patch
https://cert.pl/en/posts/2025/01/CVE-2024-11716
third-party-advisory
https://ctfd.io/
product

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Błażej Adamczyk (efigo.pl)
.