What is CVE-2025-53634?

CVE-2025-53634 is a high-severity vulnerability in Ctfer-io Chall-manager, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2025-07-10.

How severe is CVE-2025-53634?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Ctfer-io Chall-manager

CVE-2025-53634

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). Exploitatio…

EPSS: 0.004 (36.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Ctfer-io Chall-manager — versions < 0.1.4

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2025-53634?: CVE-2025-53634 is a high-severity vulnerability in Ctfer-io Chall-manager, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2025-07-10.
How severe is CVE-2025-53634?: High severity. CVSS v3 base score is 7.5 out of 10.