What is CVE-2025-53633?

CVE-2025-53633 is a critical-severity vulnerability in Ctfer-io Chall-manager, classified under Asymmetric Resource Consumption (Amplification). CVSS score: 9.8/10. Published 2025-07-10.

How severe is CVE-2025-53633?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Ctfer-io Chall-manager

CVE-2025-53633

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. Expl…

EPSS: 0.005 (37.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ctfer-io Chall-manager — versions < 0.1.4

Weakness classification (CWE)

CWE-405 — Asymmetric Resource Consumption (Amplification)

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-2025-53633?: CVE-2025-53633 is a critical-severity vulnerability in Ctfer-io Chall-manager, classified under Asymmetric Resource Consumption (Amplification). CVSS score: 9.8/10. Published 2025-07-10.
How severe is CVE-2025-53633?: Critical severity. CVSS v3 base score is 9.8 out of 10.