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CVE-2026-7429— SSCMS v7.4.0 Reflected Cross-Site Scripting via STL Processing

Quick assessment

Affected
siteserver SSCMS
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.

SSCMS（SiteServerCMS）是中国百容千域（SSCMS）公司的一个内容管理系统。 SSCMS 7.4.0版本存在跨站脚本漏洞，该漏洞源于STL处理端点中反射型跨站脚本问题，可能导致攻击者通过特制STL模板有效载荷注入可执行JavaScript，导致会话劫持、钓鱼攻击和代表用户执行未授权操作。

CVSS 4.6 · Medium EPSS 0.29% · P19

Affected Version Matrix 1

VendorProduct Version RangeStatus
siteserver SSCMS 7.4.0 affected
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I. Basic Information for CVE-2026-7429

Vulnerability Information
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Vulnerability Title
SSCMS v7.4.0 Reflected Cross-Site Scripting via STL Processing
Source: CVE Program / CVE List V5
Vulnerability Description
SSCMS v7.4.0 contains a reflected cross-site scripting vulnerability in the STL processing endpoint that allows attackers to execute arbitrary JavaScript by crafting malicious STL template payloads that are decrypted and returned without proper sanitization. Attackers can exploit improper output encoding in the /api/stl/actions/dynamic endpoint to inject executable JavaScript into JSON responses, leading to session hijacking, phishing attacks, and unauthorized actions performed on behalf of users.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/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
SSCMS 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SSCMS（SiteServerCMS）是中国百容千域（SSCMS）公司的一个内容管理系统。 SSCMS 7.4.0版本存在跨站脚本漏洞，该漏洞源于STL处理端点中反射型跨站脚本问题，可能导致攻击者通过特制STL模板有效载荷注入可执行JavaScript，导致会话劫持、钓鱼攻击和代表用户执行未授权操作。
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
siteserver SSCMS 7.4.0 -

II. Public POCs for CVE-2026-7429

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III. Intelligence Information for CVE-2026-7429

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Vendor Advisories for CVE-2026-7429 (2)

Other References for CVE-2026-7429 (1)

IV. Related Vulnerabilities

Same product: SSCMS
Same vendor: siteserver
Same weakness: CWE-79

V. Comments for CVE-2026-7429

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