{"schema_version":"1","data":[{"id":8647,"advisory_id":"03180a15-f336-4ca3-9dc9-ee14316f98f6","revision":1,"source_id":"core-cve","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100523","source_published_at":"2026-09-26T00:59:24.331+00:00","published_at":"2026-10-24T23:04:42.629138+00:00","extraction_method":"structured","technologies":["core-cve","cotonti"],"cve_ids":["CVE-2026-100523"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"Cotonti through 1.0.0 Open Redirect via message.php redirect parameter","summary":"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.","evidence":"cve:CVE-2026-100523","products":[{"name":{"value":"Cotonti","evidence":"/containers/cna/affected/0/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"medium","structured":{"id":"CVE-2026-100523","aliases":["CVE-2026-100523"],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","baseScore":5.1,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"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","userInteraction":"ACTIVE","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","subIntegrityImpact":"LOW","vulnIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","vulnConfidentialityImpact":"NONE"}},{"format":"CVSS","cvssV3_1":{"scope":"CHANGED","version":"3.1","baseScore":6.1,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","integrityImpact":"LOW","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"LOW"}}],"affected":[{"repo":"https://github.com/Cotonti/Cotonti","vendor":"Cotonti","product":"Cotonti","versions":[{"status":"affected","version":"0","versionType":"custom","lessThanOrEqual":"1.0.0"}],"packageURL":"pkg:composer/cotonti/cotonti","programFiles":["message.php","system/common.php"],"defaultStatus":"unaffected"}],"modified":"2026-10-05T14:55:04.892Z","provider":"cve","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"],"provider_metadata":{"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-100523","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-05T14:01:31.542603Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-05T14:55:04.892Z"}}],"cna":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-09-26T00:59:24.331Z"}}},"related_cves":[{"value":"CVE-2026-100523","evidence":"/cveMetadata/cveId"}],"security_relevant":true,"severity_evidence":"/containers/cna/metrics"}}],"next_after":8647,"next_before":8647}