{"id":"GHSA-43g4-487m-5q6m","summary":"Open WebUI Vulnerable to a Session Fixation Attack","details":"A vulnerability in open-webui/open-webui version 0.3.8 allows an attacker with a user-level account to perform a session fixation attack. The session cookie for all users is set with the default `SameSite=Lax` and does not have the `Secure` flag enabled, allowing the session cookie to be sent over HTTP to a cross-origin domain. An attacker can exploit this by embedding a malicious markdown image in a chat, which, when viewed by an administrator, sends the admin's session cookie to the attacker's server. This can lead to a stealthy administrator account takeover, potentially resulting in remote code execution (RCE) due to the elevated privileges of administrator accounts.","aliases":["CVE-2024-7053","PYSEC-2026-1720"],"modified":"2026-07-07T17:56:27.350481495Z","published":"2025-03-20T12:32:46Z","database_specific":{"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2025-03-21T17:30:58Z","nvd_published_at":"2025-03-20T10:15:36Z","cwe_ids":["CWE-79"]},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-7053"},{"type":"PACKAGE","url":"https://github.com/open-webui/open-webui"},{"type":"WEB","url":"https://huntr.com/bounties/947f8191-0abf-4adf-b7c4-d4c19683aba2"}],"affected":[{"package":{"name":"open-webui","ecosystem":"PyPI","purl":"pkg:pypi/open-webui"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.3.8"}]}],"versions":["0.1.124","0.1.125","0.2.0","0.2.1","0.2.2","0.2.3","0.2.4","0.2.5","0.3.0","0.3.1","0.3.2","0.3.3","0.3.4","0.3.5","0.3.6","0.3.7","0.3.8"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/03/GHSA-43g4-487m-5q6m/GHSA-43g4-487m-5q6m.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N"}]}