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.
Metrics
Affected Vendors & Products
References
History
Fri, 23 Oct 2026 00:45:00 +0000
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| Metrics |
ssvc
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Tue, 20 Oct 2026 12:45:00 +0000
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| 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. | |
| Title | Cypht 2.0.0 through 2.12.2 Stored DOM XSS via externalResources.js | |
| First Time appeared |
Cypht
Cypht cypht |
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| Weaknesses | CWE-79 | |
| CPEs | cpe:2.3:a:cypht:cypht:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Cypht
Cypht cypht |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-10-20T11:35:29.543Z
Updated: 2026-10-23T13:28:33.480Z
Reserved: 2026-10-20T11:32:02.400Z
Link: CVE-2026-113583
Updated: 2026-10-22T21:21:51.371Z
Status : Deferred
Published: 2026-10-20T12:17:29.900
Modified: 2026-10-22T22:18:04.110
Link: CVE-2026-113583
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