{"id":"CVE-2026-100523","published":"2026-09-26T01:17:00.870","lastModified":"2026-09-26T01:17:00.993","description":"Cotonti through 1.0.0 contains an open redirect vulnerability in message.php that base64-decodes the redirect parameter without domain validation. Unauthenticated attackers can craft malicious links with encoded external URLs to redirect users to arbitrary sites via meta refresh tags for phishing attacks.","cvssScore":6.1,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","cwes":["CWE-601"],"vendors":[],"products":[],"references":[{"url":"https://github.com/Cotonti/Cotonti","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/blob/1.0.0/message.php","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/blob/1.0.0/system/common.php","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/issues/1907","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/pull/1908","tags":[]},{"url":"https://www.vulncheck.com/advisories/cotonti-through-1.0.0-open-redirect-via-message-php-redirect-parameter","tags":[]}],"exploitRefs":[{"url":"https://github.com/Cotonti/Cotonti","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/blob/1.0.0/message.php","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/blob/1.0.0/system/common.php","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/issues/1907","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/pull/1908","tags":[]}],"hasPoc":true,"ai":null}