What’s Vulnerable › Vulnerabilities

CVE-2025-53632: Chall-Manager's scenario decoding process does not check for zip slips

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-07-10 · updated 2026-06-17
• Weakness: CWE-22

Description

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 path of the file to write is not checked, potentially leading to zip slips. 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 large capabilities, so no users could reach the system. Patch has been implemented by commit 47d188f and shipped in v0.1.4.

Affected products

• ctfer-io chall-manager: before 0.1.4 — fixed in 0.1.4

How to fix

Upgrade to a fixed version: ctfer-io chall-manager 0.1.4. Check the vendor advisory for mitigations.

References

• https://github.com/ctfer-io/chall-manager/commit/47d188fda5e3f86285e820f12ad9fb6f9930662c
• https://github.com/ctfer-io/chall-manager/releases/tag/v0.1.4
• https://github.com/ctfer-io/chall-manager/security/advisories/GHSA-3gv2-v3jx-r9fh

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