{"id":"CVE-2021-4097","aliases":["EUVD-2021-2485","GHSA-8qv8-fq5w-p966"],"status":"published","title":"CRLF Injection in phpservermon/phpservermon","description":"phpservermon is vulnerable to Improper Neutralization of CRLF Sequences","severity":{"version":"3.0","score":6.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00871,"percentile":0.59102,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-93"],"published":"2021-12-11T23:30:10Z","modified":"2026-10-20T10:53:55Z","affected":[{"source":"ghsa","ecosystem":"Packagist","package":"phpservermon/phpservermon","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"3.5.2"}]}]},{"source":"osv","ecosystem":"Packagist","package":"phpservermon/phpservermon","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"3.5.2"}]}],"versions":["v3.1.0","v3.1.1","v3.2.0","v3.2.0-rc1","v3.2.1","v3.2.2","v3.3.0","v3.3.1","v3.3.2","v3.4.0","v3.4.1","v3.4.2","v3.4.3","v3.4.4","v3.4.5","v3.5.0","v3.5.1","v3.5.2"]}],"products":[{"vendor":"phpservermon","product":"phpservermon/phpservermon"},{"vendor":"phpservermonitor","product":"php_server_monitor"}],"references":[{"url":"https://huntr.dev/bounties/d617ced7-be06-4e34-9db0-63d45c003a43","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/phpservermon/phpservermon/commit/162bba0046fcda1580f4fbc7b9ababe3c7c13ce4","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4097","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-8qv8-fq5w-p966"},{"url":"https://github.com/phpservermon/phpservermon","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-4097","title":"CRLF Injection in phpservermon/phpservermon","description":"phpservermon is vulnerable to Improper Neutralization of CRLF Sequences","status":"published","published":"2021-12-11T23:30:10Z","modified":"2024-08-03T17:16:04.22Z","cvss":[{"version":"3.0","score":6.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-93"],"updated_at":"2026-11-02T14:33:08.045407Z"}],"euvd":[{"id":"EUVD-2021-2485","description":"phpservermon is vulnerable to Improper Neutralization of CRLF Sequences","status":"published","published":"2021-12-11T23:30:10Z","modified":"2024-08-03T17:16:04Z","cvss":[{"version":"3.0","score":6.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-03T03:25:10.888157Z"}],"ghsa":[{"id":"GHSA-8qv8-fq5w-p966","title":"phpservermon is vulnerable to CRLF Injection","description":"phpservermon is vulnerable to Improper Neutralization of CRLF Sequences.","status":"published","published":"2021-12-16T14:26:00Z","modified":"2023-02-01T05:06:49Z","cvss":[{"version":"3.0","score":6.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","level":"medium"}],"cwes":["CWE-93"],"updated_at":"2026-11-02T14:36:39.76883Z"}],"nvd":[{"id":"CVE-2021-4097","description":"phpservermon is vulnerable to Improper Neutralization of CRLF Sequences","status":"published","published":"2021-12-12T00:15:07.743Z","modified":"2026-06-17T04:19:01.75Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"3.0","score":6.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","level":"medium","assessor":"secondary"},{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-93"],"updated_at":"2026-11-02T14:07:02.189991Z"}],"osv":[{"id":"CVE-2021-4097","description":"phpservermon is vulnerable to Improper Neutralization of CRLF Sequences","status":"published","published":"2021-12-12T00:15:07.743Z","modified":"2026-10-20T10:53:55.901673632Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:21.249056Z"},{"id":"GHSA-8qv8-fq5w-p966","title":"phpservermon is vulnerable to CRLF Injection","description":"phpservermon is vulnerable to Improper Neutralization of CRLF Sequences.","status":"published","published":"2021-12-16T14:26:00Z","modified":"2023-11-08T04:06:49.994219Z","cvss":[{"version":"3.0","score":6.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","level":"medium"}],"cwes":["CWE-93"],"updated_at":"2026-11-02T15:46:42.78452Z"}]}}
