PatchTheCVECVE-2025-53633: Chall-Manager is a platform-agnostic system able to start Challenges on Demand of a player
CVE-2025-53633 is a critical-severity flaw (CVSS 9.8) 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. When decoding a scenario (i.e. a zip archive), the size of the decoded content is not checked, potentially leading to zip bombs decompression. 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
Why this priority
- Critical severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.5% (top 55%) |
| CISA exploited list | No |
| Weakness | CWE-405 |
| 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-2025-53633?
chall-manager: upgrade to 0.1.4. Exact commands for each OS are on this page.
Is CVE-2025-53633 being exploited?
CVE-2025-53633 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-2025-53633 affect?
CVE-2025-53633 affects chall-manager. Severity is critical (CVSS 9.8). Chall-Manager is a platform-agnostic system able to start Challenges on Demand of a player. When decoding a scenario (i.e. a zip archive), the size of the decoded content is not checked, potentially leading to zip bombs decompression. Explo
How urgent is CVE-2025-53633?
Priority 50/100. Critical 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-2025-53634 HIGH 7.5 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