{"id":"CVE-2026-113583","revision":"6ecbdd0a35d14ffdb181afe092c214c2","records":[{"revision":"6ecbdd0a35d14ffdb181afe092c214c2","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-113583","aliases":[],"title":"Cypht 2.0.0 through 2.12.2 Stored DOM XSS via externalResources.js","description":"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.","state":0,"publishedAt":"2026-10-20T11:35:29.543+00:00","modifiedAt":"2026-10-22T21:21:57.052+00:00","affected":[{"ecosystem":"Vendor product","name":"cypht","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"vendor\": \"cypht-org\",\n                    \"product\": \"cypht\",\n                    \"packageURL\": \"pkg:github/cypht-org/cypht\",\n                    \"repo\": \"https://github.com/cypht-org/cypht\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"2.0.0\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"2.13.0\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","score":5.3,"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/cypht-org/cypht/pull/2118/changes/75d2fb83d228be2aaa37036a11eea68d82122d85","https://github.com/cypht-org/cypht/releases#release-v2.13.0","https://www.vulncheck.com/advisories/cypht-through-stored-dom-xss-via-externalresources-js"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-113583","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-113583","identifiers":["CVE-2026-113583"]},"retained":false,"historicalAffected":[]}],"coverage":[]}