{"id":"CVE-2026-100523","revision":"a1aa1610be4a40a4b03d320b72a8ef33","records":[{"revision":"a1aa1610be4a40a4b03d320b72a8ef33","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-100523","aliases":[],"title":"Cotonti through 1.0.0 Open Redirect via message.php redirect parameter","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.","state":0,"publishedAt":"2026-09-26T00:59:24.331+00:00","modifiedAt":"2026-10-05T14:55:04.892+00:00","affected":[{"ecosystem":"Vendor product","name":"Cotonti","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Cotonti\",\n                    \"product\": \"Cotonti\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:composer/cotonti/cotonti\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThanOrEqual\": \"1.0.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"repo\": \"https://github.com/Cotonti/Cotonti\",\n                    \"programFiles\": [\n                        \"message.php\",\n                        \"system/common.php\"\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","score":5.1,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1,"severity":"MEDIUM"}],"references":["https://github.com/Cotonti/Cotonti/issues/1907","https://github.com/Cotonti/Cotonti/pull/1908","https://github.com/Cotonti/Cotonti/blob/1.0.0/message.php","https://github.com/Cotonti/Cotonti/blob/1.0.0/system/common.php","https://github.com/Cotonti/Cotonti","https://www.vulncheck.com/advisories/cotonti-through-1.0.0-open-redirect-via-message-php-redirect-parameter"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-100523","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-100523","identifiers":["CVE-2026-100523"]},"retained":false,"historicalAffected":[]}],"coverage":[]}