{"id":"CVE-2021-40099","aliases":["EUVD-2021-27288","GHSA-25jh-rpgw-34vr"],"status":"published","title":"An issue was discovered in Concrete CMS through 8.5.5. Fetching the update json scheme over HTTP...","description":"An issue was discovered in Concrete CMS through 8.5.5. Fetching the update json scheme over HTTP leads to remote code execution.","severity":{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.02077,"percentile":0.81766,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-09-24T14:58:32Z","modified":"2026-10-24T10:31:03Z","products":[{"vendor":"concretecms","product":"concrete_cms"}],"references":[{"url":"https://hackerone.com/reports/982130","tags":["x_refsource_MISC","x_transferred","Permissions Required","Third Party Advisory","report"]},{"url":"https://documentation.concretecms.org/developers/introduction/version-history/856-release-notes","tags":["x_refsource_MISC","x_transferred","Release Notes","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-40099"},{"url":"https://github.com/advisories/GHSA-25jh-rpgw-34vr"}],"sources":{"cve":[{"id":"CVE-2021-40099","description":"An issue was discovered in Concrete CMS through 8.5.5. Fetching the update json scheme over HTTP leads to remote code execution.","status":"published","published":"2021-09-24T14:58:32Z","modified":"2024-08-04T02:27:31.146Z","updated_at":"2026-11-02T14:33:01.852999Z"}],"euvd":[{"id":"EUVD-2021-27288","description":"An issue was discovered in Concrete CMS through 8.5.5. Fetching the update json scheme over HTTP leads to remote code execution.","status":"published","published":"2021-09-24T14:58:32Z","modified":"2024-08-04T02:27:31Z","updated_at":"2026-11-03T03:24:21.368958Z"}],"ghsa":[{"id":"GHSA-25jh-rpgw-34vr","title":"An issue was discovered in Concrete CMS through 8.5.5. Fetching the update json scheme over HTTP...","description":"An issue was discovered in Concrete CMS through 8.5.5. Fetching the update json scheme over HTTP leads to remote code execution.","status":"published","published":"2022-05-24T19:15:43Z","modified":"2023-01-30T05:02:19Z","updated_at":"2026-11-02T14:46:36.658869Z"}],"nvd":[{"id":"CVE-2021-40099","description":"An issue was discovered in Concrete CMS through 8.5.5. Fetching the update json scheme over HTTP leads to remote code execution.","status":"published","published":"2021-09-24T15:15:08.597Z","modified":"2026-06-17T04:06:31.147Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:58.933037Z"}],"osv":[{"id":"CVE-2021-40099","description":"An issue was discovered in Concrete CMS through 8.5.5. Fetching the update json scheme over HTTP leads to remote code execution.","status":"published","published":"2021-09-24T15:15:08.597Z","modified":"2026-10-24T10:31:03.723087542Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:21.249056Z"}]}}