{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/118922?format=json","vulnerability_id":"VCID-pqcf-g97h-8ua5","summary":"Vulnerability in the access control system of the GAMS licensing system that allows unlimited valid licenses to be generated, bypassing any usage restrictions. The validator uses an insecure checksum algorithm; knowing this algorithm and the format of the license lines, an attacker can recalculate the checksum and generate a valid license to grant themselves full privileges without credentials or access to the source code, allowing them unrestricted access to GAMS's mathematical models and commercial solvers.","aliases":[{"alias":"CVE-2025-41086"}],"fixed_packages":[],"affected_packages":[],"references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2025-41086","reference_id":"","reference_type":"","scores":[{"value":"0.00036","scoring_system":"epss","scoring_elements":"0.11086","published_at":"2026-06-11T12:55:00Z"},{"value":"0.00036","scoring_system":"epss","scoring_elements":"0.11153","published_at":"2026-06-12T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2025-41086"},{"reference_url":"https://www.incibe.es/en/incibe-cert/notices/aviso/authorization-bypass-gams-gams-development-corp","reference_id":"authorization-bypass-gams-gams-development-corp","reference_type":"","scores":[{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-02T14:24:13Z/"}],"url":"https://www.incibe.es/en/incibe-cert/notices/aviso/authorization-bypass-gams-gams-development-corp"},{"reference_url":"https://www.gams.com/latest/docs/RN_51.html","reference_id":"RN_51.html","reference_type":"","scores":[{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-02T14:24:13Z/"}],"url":"https://www.gams.com/latest/docs/RN_51.html"}],"weaknesses":[{"cwe_id":639,"name":"Authorization Bypass Through User-Controlled Key","description":"The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data."}],"exploits":[],"severity_range_score":"6.9 - 6.9","exploitability":null,"weighted_severity":null,"risk_score":null,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-pqcf-g97h-8ua5"}