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CVE-2026-73524— Cypht < 2.12.2 XSS via FROM Email Header in Contacts Module

Quick assessment

Affected
cypht-org cypht
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cypht是Cypht组织开源的一款网页邮件聚合客户端。 Cypht 2.12.2之前版本存在跨站脚本漏洞，该漏洞源于contacts模块对FROM邮件标头中的尖括号清理不当，仅移除第一个尖括号字符，可能导致远程攻击者通过构造恶意邮件在用户打开消息并访问Add Local Contacts功能时在受害者浏览器中执行任意脚本。

CVSS 6.1 · Medium EPSS 0.41% · P34

Affected Version Matrix 1

VendorProduct Version RangeStatus
cypht-org cypht < 2.12.2 affected
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I. Basic Information for CVE-2026-73524

Vulnerability Information
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Vulnerability Title
Cypht < 2.12.2 XSS via FROM Email Header in Contacts Module
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Cypht 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cypht是Cypht组织开源的一款网页邮件聚合客户端。 Cypht 2.12.2之前版本存在跨站脚本漏洞，该漏洞源于contacts模块对FROM邮件标头中的尖括号清理不当，仅移除第一个尖括号字符，可能导致远程攻击者通过构造恶意邮件在用户打开消息并访问Add Local Contacts功能时在受害者浏览器中执行任意脚本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
cypht-org cypht 0 ~ 2.12.2 -

II. Public POCs for CVE-2026-73524

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III. Intelligence Information for CVE-2026-73524

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Patches & Fixes for CVE-2026-73524 (2)

Vendor Advisories for CVE-2026-73524 (1)

Vendor Pages for CVE-2026-73524 (1)

IV. Related Vulnerabilities

Same product: cypht
Same vendor: cypht-org
Same weakness: CWE-79

V. Comments for CVE-2026-73524

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