{"schema":"threatline.record/2","record":{"id":"CVE-2026-100523","aliases":[],"summary":"Cotonti through 1.0.0 Open Redirect via message.php redirect parameter","details":"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.","categories":["Unclassified"],"product":"Cotonti","vendor":"Cotonti","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100523","source_modified_at":"2026-10-05T14:55:04.892Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Cotonti","vendor":"Cotonti","versions":[{"version":"0","lessThanOrEqual":"1.0.0","status":"affected","versionType":"custom"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":5.1,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00188,"percentile":0.07939,"score_date":"2026-10-23"},"published_at":"2026-09-26T00:59:24.331Z","modified_at":"2026-10-05T14:55:04.892Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-100523","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-05T14:55:04.892Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-100523","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/Cotonti/Cotonti/issues/1907","tags":["issue-tracking"]},{"source":"CVE List","url":"https://github.com/Cotonti/Cotonti/pull/1908","tags":["issue-tracking","patch"]},{"source":"CVE List","url":"https://github.com/Cotonti/Cotonti/blob/1.0.0/message.php","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/Cotonti/Cotonti/blob/1.0.0/system/common.php","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/Cotonti/Cotonti","tags":["product"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/cotonti-through-1.0.0-open-redirect-via-message-php-redirect-parameter","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-05T14:01:31.542603Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-05T14:55:04.892Z","content_hash":"c7917b99dac03d1f7dd0fb53e5f10a22bd1daf677d9459ecd0b381010584907b"}}