CVE-2026-73524
Cypht < 2.12.2 XSS via FROM Email Header in Contacts Module
Cypht before 2.12.2 contains a cross-site scripting vulnerability in the contacts module that allows remote attackers to execute arbitrary script content by embedding malicious payloads within angle brackets in the FROM email header. The sanitization logic removes only the first occurrence of each angle bracket character, leaving additional angle brackets intact, which attackers exploit by delivering a crafted email whose FROM header executes script in the victim's browser when the user opens the message and accesses the Add Local Contacts function.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| cypht cypht-org cypht-org/cypht
github |
≥ 0; < 2.12.2 (affected, semver)
Other versions: affected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 5.1 medium |
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 | CNA: VulnCheck |
| 3.1 / 6.1 medium |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/cypht-org/cypht/releases/tag/v2.12.2CNA: VulnCheck · release-notes
- https://github.com/cypht-org/cypht/pull/2072CNA: VulnCheck · issue-tracking, patch
- https://github.com/cypht-org/cypht/commit/372343783b3d21c12f74bb88d0eef36c1579c062CNA: VulnCheck · patch
- https://www.vulncheck.com/advisories/cypht-xss-via-from-email-header-in-contacts-moduleCNA: VulnCheck · third-party-advisory
For agents and automation
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