{"cve":"CVE-2025-53634","nvd":{"published":"2025-07-10T20:15:27.987","modified":"2026-06-17T09:38:36.780","status":"Analyzed","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_v4":{"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","score":8.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-770"],"references":["https://github.com/ctfer-io/chall-manager/commit/1385bd869142651146cd0b123085f91cec698636","https://github.com/ctfer-io/chall-manager/releases/tag/v0.1.4","https://github.com/ctfer-io/chall-manager/security/advisories/GHSA-ggmv-j932-q89q"],"products":["ctfer-io:chall-manager"],"source":"nvd","synced_at":"2026-10-19T22:04:28.436527499+00:00"},"epss":{"cve":"CVE-2025-53634","score":0.00508,"percentile":0.43413,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-ggmv-j932-q89q","url":"https://osv.dev/vulnerability/GHSA-ggmv-j932-q89q","summary":"Chall-Manager's HTTP Gateway is vulnerable to DoS due to missing header timeout","modified":"2025-08-14T22:21:18Z","packages":[{"ecosystem":"Go","name":"github.com/ctfer-io/chall-manager","purl":"pkg:golang/github.com/ctfer-io/chall-manager","ranges":["<0.1.4"],"fixed":["0.1.4"]}]},{"id":"GO-2025-3809","url":"https://osv.dev/vulnerability/GO-2025-3809","summary":"Chall-Manager's HTTP Gateway is vulnerable to DoS due to missing header timeout in github.com/ctfer-io/chall-manager","modified":"2026-03-03T04:57:22.389125Z","packages":[{"ecosystem":"Go","name":"github.com/ctfer-io/chall-manager","purl":"pkg:golang/github.com/ctfer-io/chall-manager","ranges":["<0.1.4"],"fixed":["0.1.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}