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CVE-2026-66494— Joomla Extension - joomshaper.com - Unauthenticated stored XSS in Shapes API endpoint SP Page Builder < 6.7.0

Quick assessment

Affected
joomshaper.com SP Page Builder extension for Joomla
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.

JoomShaper SP Page Builder是JoomShaper公司的一款Joomla页面构建器扩展组件。 JoomShaper SP Page Builder 6.7.0之前版本存在安全漏洞，该漏洞源于Shapes API端点对输入验证不当，导致容易受到存储型跨站脚本攻击，未经身份验证的攻击者可通过单个HTTP请求将恶意JavaScript存储到Joomla站点数据库中，当管理员打开SP Page Builder编辑器时，脚本会在浏览器中自动执行。

CVSS 8.7 · High EPSS 0.50% · P40

Affected Version Matrix 1

VendorProduct Version RangeStatus
joomshaper.com SP Page Builder extension for Joomla 1.0.0-6.6.2 affected
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I. Basic Information for CVE-2026-66494

Vulnerability Information
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Vulnerability Title
Joomla Extension - joomshaper.com - Unauthenticated stored XSS in Shapes API endpoint SP Page Builder < 6.7.0
Source: CVE Program / CVE List V5
Vulnerability Description
Joomla Extension - joomshaper.com - Unauthenticated stored XSS in Shapes API endpoint SP Page Builder < 6.7.0 - An unauthenticated attacker can store malicious JavaScript in a Joomla site's database via a single HTTP request. When an administrator opens the SP Page Builder editor, the JavaScript executes in their browser automatically..
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
JoomShaper SP Page Builder 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
JoomShaper SP Page Builder是JoomShaper公司的一款Joomla页面构建器扩展组件。 JoomShaper SP Page Builder 6.7.0之前版本存在安全漏洞，该漏洞源于Shapes API端点对输入验证不当，导致容易受到存储型跨站脚本攻击，未经身份验证的攻击者可通过单个HTTP请求将恶意JavaScript存储到Joomla站点数据库中，当管理员打开SP Page Builder编辑器时，脚本会在浏览器中自动执行。
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
joomshaper.com SP Page Builder extension for Joomla 1.0.0-6.6.2 -

II. Public POCs for CVE-2026-66494

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III. Intelligence Information for CVE-2026-66494

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Other References for CVE-2026-66494 (1)

IV. Related Vulnerabilities

Same product: SP Page Builder extension for Joomla
Same vendor: joomshaper.com
Same weakness: CWE-284

V. Comments for CVE-2026-66494

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