{"id":"CVE-2026-67350","title":"Serendipity before 2.6.1 contains an open redirect vulnerability in exit.php that allows unauthenticated attackers to redirect users to arbitrary external sites by supplying a malicious Base64-encoded url parameter when the Track Exits p…","summary":"Serendipity before 2.6.1 contains an open redirect vulnerability in exit.php that allows unauthenticated attackers to redirect users to arbitrary external sites by supplying a malicious Base64-encoded url parameter when the Track Exits p…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","cwe":["CWE-601"],"published":"2026-07-31","updated":"2026-09-09","sourceUpdated":"2026-09-09T20:35:08.537","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-67350","references":[{"url":"https://github.com/s9y/Serendipity/security/advisories/GHSA-77rw-27c5-4hxm","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/serendipity-open-redirect-via-exit-php","label":"disclosure@vulncheck.com"},{"url":"https://github.com/s9y/Serendipity/security/advisories/GHSA-77rw-27c5-4hxm","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00258,"epssPercentile":0.17837,"ingestedAt":"2026-08-02T00:16:16.100Z","slug":"CVE-2026-67350","body":"## Overview\n\nSerendipity before 2.6.1 contains an open redirect vulnerability in exit.php that allows unauthenticated attackers to redirect users to arbitrary external sites by supplying a malicious Base64-encoded url parameter when the Track Exits plugin is configured with commentredirection set to s9y. Attackers can craft trusted-looking URLs leveraging the legitimate blog domain to conduct phishing, deliver malware, or bypass URL reputation filters.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}