{"id":"CVE-2018-11407","aliases":["DEBIAN-CVE-2018-11407","EUVD-2022-2111","GHSA-35c5-28pg-2qg4","UBUNTU-CVE-2018-11407","USN-4836-1"],"status":"published","title":"Symfony Authentication Bypass","description":"An issue was discovered in the Ldap component in Symfony 2.8.x before 2.8.37, 3.3.x before 3.3.17, 3.4.x before 3.4.7, and 4.0.x before 4.0.7. It allows remote attackers to bypass authentication by logging in with a \"null\" password and valid username, which triggers an unauthenticated bind.  NOTE: this issue exists because of an incomplete fix for CVE-2016-2403.","severity":{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02366,"percentile":0.83912,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-287"],"published":"2018-06-13T16:00:00Z","modified":"2026-10-24T10:30:58Z","fixes":[{"ecosystem":"Packagist","package":"symfony/security-core","fixed_in":["2.8.37","3.3.17","3.4.7","4.0.7"],"sources":["ghsa","osv"]},{"ecosystem":"Packagist","package":"symfony/security","fixed_in":["2.8.37","3.3.17","3.4.7","4.0.7"],"sources":["ghsa","osv"]},{"ecosystem":"Packagist","package":"symfony/symfony","fixed_in":["2.8.37","3.3.17","3.4.7","4.0.7"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:12","package":"symfony","fixed_in":["3.4.12+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"symfony","fixed_in":["3.4.12+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"symfony","fixed_in":["3.4.12+dfsg-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:18.04:LTS","package":"symfony","fixed_in":["3.4.6+dfsg-1ubuntu0.1+esm1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"symfony/security-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.8.0"},{"fixed":"2.8.37"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"symfony/security-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.3.17"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"symfony/security-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.4.0"},{"fixed":"3.4.7"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"symfony/security-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.0.7"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"symfony/security","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.8.0"},{"fixed":"2.8.37"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"symfony/security","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.3.17"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"symfony/security","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.4.0"},{"fixed":"3.4.7"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"symfony/security","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.0.7"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"symfony/symfony","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.8.0"},{"fixed":"2.8.37"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"symfony/symfony","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.3.17"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"symfony/symfony","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.4.0"},{"fixed":"3.4.7"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"symfony/symfony","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.0.7"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"symfony","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.12+dfsg-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"symfony","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.12+dfsg-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"symfony","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.12+dfsg-1"}]}]},{"source":"osv","ecosystem":"Packagist","package":"symfony/security-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.8.0"},{"fixed":"2.8.37"}]}],"versions":["v2.8.0","v2.8.1","v2.8.10","v2.8.11","v2.8.12","v2.8.13","v2.8.14","v2.8.15","v2.8.16","v2.8.17","v2.8.18","v2.8.19","v2.8.2","v2.8.20","v2.8.21","v2.8.22","v2.8.23","v2.8.24","v2.8.25","v2.8.26","v2.8.27","v2.8.28","v2.8.29","v2.8.3","v2.8.30","v2.8.31","v2.8.32","v2.8.33","v2.8.34","v2.8.35","v2.8.36","v2.8.4","v2.8.5","v2.8.6","v2.8.7","v2.8.8","v2.8.9"]},{"source":"osv","ecosystem":"Packagist","package":"symfony/security-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.3.17"}]}],"versions":["v3.0.0","v3.0.1","v3.0.2","v3.0.3","v3.0.4","v3.0.5","v3.0.6","v3.0.7","v3.0.8","v3.0.9","v3.1.0","v3.1.0-BETA1","v3.1.0-RC1","v3.1.1","v3.1.10","v3.1.2","v3.1.3","v3.1.4","v3.1.5","v3.1.6","v3.1.7","v3.1.8","v3.1.9","v3.2.0","v3.2.0-BETA1","v3.2.0-RC1","v3.2.0-RC2","v3.2.1","v3.2.10","v3.2.11","v3.2.12","v3.2.13","v3.2.14","v3.2.2","v3.2.3","v3.2.4","v3.2.5","v3.2.6","v3.2.7","v3.2.8","v3.2.9","v3.3.0","v3.3.0-BETA1","v3.3.0-RC1","v3.3.1","v3.3.10","v3.3.11","v3.3.12","v3.3.13","v3.3.14","v3.3.15","v3.3.16","v3.3.2","v3.3.3","v3.3.4","v3.3.5","v3.3.6","v3.3.7","v3.3.8","v3.3.9"]},{"source":"osv","ecosystem":"Packagist","package":"symfony/security-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.4.0"},{"fi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Advisory","advisory","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-11407","tags":["advisory"]},{"url":"https://github.com/symfony/symfony/pull/27377","tags":["web"]},{"url":"https://github.com/symfony/symfony/commit/b46fc93785d37ffa5d706a82cd175b33ce8f2934","tags":["web"]},{"url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-core/CVE-2018-11407.yaml","tags":["web"]},{"url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security/CVE-2018-11407.yaml","tags":["web"]},{"url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2018-11407.yaml","tags":["web"]},{"url":"https://symfony.com/cve-2018-11407","tags":["web"]},{"url":"https://github.com/advisories/GHSA-35c5-28pg-2qg4"},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-11407","tags":["advisory"]},{"url":"https://github.com/symfony/symfony","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2018-11407","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-4836-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-11407","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2018-11407","description":"An issue was discovered in the Ldap component in Symfony 2.8.x before 2.8.37, 3.3.x before 3.3.17, 3.4.x before 3.4.7, and 4.0.x before 4.0.7. It allows remote attackers to bypass authentication by logging in with a \"null\" password and valid username, which triggers an unauthenticated bind.  NOTE: this issue exists because of an incomplete fix for CVE-2016-2403.","status":"published","published":"2018-06-13T16:00:00Z","modified":"2024-08-05T08:10:13.669Z","updated_at":"2026-11-02T14:35:09.570381Z"}],"euvd":[{"id":"EUVD-2022-2111","description":"An issue was discovered in the Ldap component in Symfony 2.8.x before 2.8.37, 3.3.x before 3.3.17, 3.4.x before 3.4.7, and 4.0.x before 4.0.7. It allows remote attackers to bypass authentication by logging in with a \"null\" password and valid username, which triggers an unauthenticated bind.  NOTE: this issue exists because of an incomplete fix for CVE-2016-2403.","status":"published","published":"2018-06-13T16:00:00Z","modified":"2024-08-05T08:10:13Z","updated_at":"2026-11-03T02:39:55.512487Z"}],"ghsa":[{"id":"GHSA-35c5-28pg-2qg4","title":"Symfony Authentication Bypass","description":"An issue was discovered in the LDAP component in Symfony 2.8.x before 2.8.37, 3.3.x before 3.3.17, 3.4.x before 3.4.7, and 4.0.x before 4.0.7. It allows remote attackers to bypass authentication by logging in with a \"null\" password and valid username, which triggers an unauthenticated bind.  **NOTE:** this issue exists because of an incomplete fix for CVE-2016-2403.","status":"published","published":"2022-05-14T03:10:52Z","modified":"2024-04-25T22:11:26Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:37:47.338362Z"}],"nvd":[{"id":"CVE-2018-11407","description":"An issue was discovered in the Ldap component in Symfony 2.8.x before 2.8.37, 3.3.x before 3.3.17, 3.4.x before 3.4.7, and 4.0.x before 4.0.7. It allows remote attackers to bypass authentication by logging in with a \"null\" password and valid username, which triggers an unauthenticated bind.  NOTE: this issue exists because of an incomplete fix for CVE-2016-2403.","status":"published","published":"2018-06-13T16:29:01.047Z","modified":"2026-06-17T01:35:52.347Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:04:29.837913Z"}],"osv":[{"id":"CVE-2018-11407","description":"An issue was discovered in the Ldap component in Symfony 2.8.x before 2.8.37, 3.3.x before 3.3.17, 3.4.x before 3.4.7, and 4.0.x before 4.0.7. It allows remote attackers to bypass authentication by logging in with a \"null\" password and valid username, which triggers an unauthenticated bind.  NOTE: this issue exists because of an incomplete fix for CVE-2016-2403.","status":"published","published":"2018-06-13T16:29:01.047Z","modified":"2026-10-24T10:30:58.894471538Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:07.934182Z"},{"id":"DEBIAN-CVE-2018-11407","description":"An issue was discovered in the Ldap component in Symfony 2.8.x before 2.8.37, 3.3.x before 3.3.17, 3.4.x before 3.4.7, and 4.0.x before 4.0.7. It allows remote attackers to bypass authentication by logging in with a \"null\" password and valid username, which triggers an unauthenticated bind.  NOTE: this issue exists because of an incomplete fix for CVE-2016-2403.","status":"published","published":"2018-06-13T16:29:01.047Z","modified":"2026-10-23T18:03:46.809753487Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:29.988046Z"},{"id":"GHSA-35c5-28pg-2qg4","title":"Symfony Authentication Bypass","description":"An issue was discovered in the LDAP component in Symfony 2.8.x before 2.8.37, 3.3.x before 3.3.17, 3.4.x before 3.4.7, and 4.0.x before 4.0.7. It allows remote attackers to bypass authentication by logging in with a \"null\" password and valid username, which triggers an unauthenticated bind.  **NOTE:** this issue exists because of an incomplete fix for CVE-2016-2403.","status":"published","published":"2022-05-14T03:10:52Z","modified":"2024-04-25T22:28:47.853579Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T15:46:35.050232Z"},{"id":"UBUNTU-CVE-2018-11407","description":"An issue was discovered in the Ldap component in Symfony 2.8.x before 2.8.37, 3.3.x before 3.3.17, 3.4.x before 3.4.7, and 4.0.x before 4.0.7. It allows remote attackers to bypass authentication by logging in with a \"null\" password and valid username, which triggers an unauthenticated bind.  NOTE: this issue exists because of an incomplete fix for CVE-2016-2403.","status":"published","published":"2018-06-13T16:29:00Z","modified":"2026-02-04T02:15:30.493613Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:54:16.544091Z"},{"id":"USN-4836-1","title":"symfony vulnerability","description":"It was discovered that Symfony through the HttpFoundation \ncomponent allowed unauthorized access on a misconfigured LDAP server. A\nremote attacker could use this vulnerability to gain unauthorized access.\n","status":"published","published":"2021-03-15T22:18:44Z","modified":"2026-02-10T04:42:06Z","updated_at":"2026-11-02T16:58:15.159055Z"}]}}