CVE Catalog

CVE-2026-113583

MediumCVSS 6.1
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.29%

20th percentile - higher than 20% of all known CVEs

Summary

Cypht webmail 2.0.0 through 2.12.2 contains a DOM-based cross-site scripting vulnerability. When ALLOW_EXTERNAL_IMAGE_SOURCES is enabled, an attacker can send a crafted email with malicious alt text or URL values in an external image tag, leading to arbitrary JavaScript execution in the victim's session.

Risk Assessment

An attacker can execute arbitrary JavaScript in the victim's authenticated session, enabling mailbox reading, email sending, or settings changes.

Recommendation

Update Cypht webmail to a version later than 2.12.2 or disable ALLOW_EXTERNAL_IMAGE_SOURCES until a fix is available.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS