{"id":"CVE-2025-53634","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-53634","generatedAt":"2026-10-28T04:34:20.437Z","title":"With a slow loris attack, an attacker could cause Denial of Service (DoS).","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.","published":"2025-07-10T20:15:28.000Z","lastModified":"2026-06-17T09:38:37.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":8.7,"severity":"HIGH","vector":"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/M"},"cwe":["CWE-770"],"affected":["ctfer-io/chall-manager"],"epss":{"score":0.00508,"percentile":0.43188,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.51%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/ctfer-io/chall-manager/commit/1385bd869142651146cd0b123085f91cec698636","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/ctfer-io/chall-manager/releases/tag/v0.1.4","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/ctfer-io/chall-manager/security/advisories/GHSA-ggmv-j932-q89q","tags":["Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-53634","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}