{"schema":"threatline.record/2","record":{"id":"CVE-2026-113583","aliases":[],"summary":"Cypht 2.0.0 through 2.12.2 Stored DOM XSS via externalResources.js","details":"Cypht webmail 2.0.0 through 2.12.2 contains a DOM-based cross-site scripting vulnerability that allows remote attackers to execute arbitrary JavaScript by crafting malicious alt text or URL values in an HTML email's external image tag when ALLOW_EXTERNAL_IMAGE_SOURCES is enabled. Attackers can send a specially crafted email so that when the victim opens it, the externalResources.js code builds the blocked-image notice using innerHTML with decoded email-derived values, triggering script execution in the victim's authenticated session to read mailboxes, send email, or change settings.","categories":["Unclassified"],"product":"cypht","vendor":"cypht-org","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-113583","source_modified_at":"2026-10-23T13:28:33.480Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"cypht","vendor":"cypht-org","versions":[{"status":"affected","version":"2.0.0","versionType":"semver","lessThan":"2.13.0"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-113583","source_modified_at":"2026-10-23T13:28:33.480Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"cypht","ecosystem":null},"version":"2.13.0","basis":"first unaffected version stated in the CVE record"}],"cvss":5.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00287,"percentile":0.20136,"score_date":"2026-10-23"},"published_at":"2026-10-20T11:35:29.543Z","modified_at":"2026-10-23T13:28:33.480Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-113583","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T13:28:33.480Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-113583","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/cypht-org/cypht/pull/2118/changes/75d2fb83d228be2aaa37036a11eea68d82122d85","tags":["issue-tracking","patch"]},{"source":"CVE List","url":"https://github.com/cypht-org/cypht/releases#release-v2.13.0","tags":["patch"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/cypht-through-stored-dom-xss-via-externalresources-js","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":"2026-10-22T21:21:45.694914Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-23T13:28:33.480Z","content_hash":"d9782b6909089d9d3607c69ad1bbbac74863f3f2183abf9b9bf0f63998f34827"}}