Vulnerability Details 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). 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 1385bd8 and shipped in v0.1.4.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 49.7%
CVSS Severity
CVSS v3 Score 7.5
References
Products affected by CVE-2025-53634
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cpe:2.3:a:ctfer-io:chall-manager:*