{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.4.0"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "480eb3043c9ee79d6e8e6eacf981f49cfe00f6ed"
            },
            {
              "fixed": "6fdd4a29969be8423f31890b807d27d13627c50c"
            }
          ],
          "repo": "https://github.com/chatwoot/chatwoot",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "A Session Fixation vulnerability exists in chatwoot/chatwoot versions prior to 2.4.0. The application does not invalidate existing sessions on other devices when a user changes their password, allowing old sessions to persist. This can lead to unauthorized access if an attacker has obtained a session token.",
  "id": "CVE-2021-3740",
  "modified": "2026-03-10T21:49:39.586687885Z",
  "published": "2024-11-15T11:15:04.987Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://huntr.com/bounties/1625470476437-chatwoot/chatwoot"
    },
    {
      "type": "FIX",
      "url": "https://github.com/chatwoot/chatwoot/commit/6fdd4a29969be8423f31890b807d27d13627c50c"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}