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CVE-2026-55230— Vvveb: Stored XSS in Vvveb via sanitizeHTML() filter bypass using a quoted greater-than character

Quick assessment

Affected
givanz Vvveb
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.

Vvveb 是一款功能强大且易于使用的 CMS（内容管理系统），内置页面构建器，可用于搭建网站、博客或电子商务商店。在 1.0.8.6 版本之前，Vvveb 的 HTML 净化器（sanitizer）存在缺陷：当某个标签的引号包裹的属性值中包含大于号（>）字符时，该净化器无法正确移除事件处理程序属性（如 onclick、onload 等）。 因此，低权限的内容作者（默认角色为 author 或 contributor）可以在文章或产品内容中植入恶意载荷，使得任何浏览该内容的访客以及查看或预览该内容的所有管理员的浏览

CVSS 8.7 · High
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I. Basic Information for CVE-2026-55230

Vulnerability Information
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Vulnerability Title
Vvveb: Stored XSS in Vvveb via sanitizeHTML() filter bypass using a quoted greater-than character
Source: CVE Program / CVE List V5
Vulnerability Description
Vvveb is a powerful and easy to use CMS with page builder to build websites, blogs or ecommerce stores. Prior to version 1.0.8.6, Vvveb's HTML sanitizer fails to strip event-handler attributes when a tag carries a greater-than character inside a quoted attribute value. A low-privilege content author (default role author or contributor) can store a payload in post or product content that runs JavaScript in a browser of every visitor and of any administrator who views or previews that content, which opens a path to admin account takeover. This issue has been patched in version 1.0.8.6.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/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

Affected Products

Vendor Product Affected Versions CPE Subscribe
givanz Vvveb < 1.0.8.6 -

II. Public POCs for CVE-2026-55230

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III. Intelligence Information for CVE-2026-55230

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Other References for CVE-2026-55230 (2)

Same Patch Batch · givanz · 2026-10-01 · 3 CVEs total

CVE-2026-55232 7.6 HIGH Vvveb: Server-side request forgery in Vvveb via IPv6 bypass of validateUrl() in editor oEm
CVE-2026-55231 7.2 HIGH Vvveb: Path traversal in Vvveb via sanitizeFileName() bypass enables arbitrary file read a

IV. Related Vulnerabilities

Same product: Vvveb
Same vendor: givanz
Same weakness: CWE-79

V. Comments for CVE-2026-55230

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