PatchTheCVECVE-2025-53634: Chall-Manager is a platform-agnostic system able to start Challenges on Demand of a player
CVE-2025-53634 is a high-severity flaw (CVSS 7.5) affecting chall-manager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Chall-Manager is a platform-agnostic system able to start Challenges on Demand of a player. The HTTP Gateway processes headers, but with no timeout set. With a slow loris attack, an attacker could cause Denial of Service (DoS). Exploitation does not require authentication nor authorization, so anyone can exploit it. It should nonetheless not be exploitable as it is highly recommended to bury Chall-Manager deep within the infrastructure due to its
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.5% (top 57%) |
| CISA exploited list | No |
| Weakness | CWE-770 |
| Published | 2025-07-10 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2025-53634?
chall-manager: upgrade to 0.1.4. Exact commands for each OS are on this page.
Is CVE-2025-53634 being exploited?
CVE-2025-53634 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2025-53634 affect?
CVE-2025-53634 affects chall-manager. Severity is high (CVSS 7.5). Chall-Manager is a platform-agnostic system able to start Challenges on Demand of a player. The HTTP Gateway processes headers, but with no timeout set. With a slow loris attack, an attacker could cause Denial of Service (DoS). Exploitation
How urgent is CVE-2025-53634?
Priority 42/100. High severity; Remotely exploitable, no login, no user action
Related CVEs
- CVE-2026-32768 CRITICAL 9.9 UPGRADE Chall-Manager is a platform-agnostic system able to start Challenges on Demand of a player
- CVE-2025-53633 CRITICAL 9.8 UPGRADE Chall-Manager is a platform-agnostic system able to start Challenges on Demand of a player
- CVE-2025-53632 CRITICAL 9.1 UPGRADE Chall-Manager is a platform-agnostic system able to start Challenges on Demand of a player