CVE-2025-53634

HIGH EPSS 35.5%
Published Jul 10, 202511mo ago · Modified Jun 17, 20261w ago
8.7 CVSS 4.0
High
Find Similar
Published Jul 10, 2025 11mo ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
8.7
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
35.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-770

Affected Products 1

VendorProductVersionRange
ctfer-iochall-manager* <0.1.4

References 3

  • github.com https://github.com/ctfer-io/chall-manager/commit/1385bd869142651146cd0b123085f91cec698636
    Patch
  • github.com https://github.com/ctfer-io/chall-manager/releases/tag/v0.1.4
    Release Notes
  • github.com https://github.com/ctfer-io/chall-manager/security/advisories/GHSA-ggmv-j932-q89q
    Vendor Advisory

Remediation

  • github.com https://github.com/ctfer-io/chall-manager/commit/1385bd869142651146cd0b123085f91cec698636
    Patch