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CVE-2026-107764— SiteOrigin CSS <= 1.6.7 - Unauthenticated Stored DOM-Based Cross-Site Scripting via Comment Author URL via Inspector href Sink

Quick assessment

Affected
gpriday SiteOrigin CSS
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.

WordPress 的 SiteOrigin CSS 插件在所有 1.6.7 及更早版本中，因输入过滤和输出转义不足，存在通过 （即 ）参数触发的存储型 DOM 跨站脚本（Stored DOM-Based XSS）漏洞。这使得未经身份验证的攻击者能够在页面中注入任意 Web 脚本；当用户访问被注入的页面时，这些脚本将被执行。该漏洞之所以可行，是因为 WordPress 核心函数 会保留 HTML 实体编码字符，导致攻击者在评论“网站”字段中精心构造的实体编码载荷能够绕过存储阶段的过滤，并在浏览器端于输出点被 DOM

CVSS 7.2 · High EPSS 0.24% · P14

Affected Version Matrix 1

VendorProduct Version RangeStatus
gpriday SiteOrigin CSS ≤ 1.6.7 affected
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I. Basic Information for CVE-2026-107764

Vulnerability Information
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Vulnerability Title
SiteOrigin CSS <= 1.6.7 - Unauthenticated Stored DOM-Based Cross-Site Scripting via Comment Author URL via Inspector href Sink
Source: CVE Program / CVE List V5
Vulnerability Description
The SiteOrigin CSS plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the 'url (comment_author_url)' parameter in all versions up to, and including, 1.6.7 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is possible because WordPress core's esc_url() preserves HTML entity-encoded characters, allowing a crafted entity-encoded payload in the comment 'Website' field to survive storage and be DOM-decoded by the browser into executable markup at the sink.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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

Affected Products

Vendor Product Affected Versions CPE Subscribe
gpriday SiteOrigin CSS 0 ~ 1.6.7 -

II. Public POCs for CVE-2026-107764

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III. Intelligence Information for CVE-2026-107764

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Vendor Advisories for CVE-2026-107764 (1)

Other References for CVE-2026-107764 (1)

IV. Related Vulnerabilities

Same product: SiteOrigin CSS
Same vendor: gpriday
Same weakness: CWE-79

V. Comments for CVE-2026-107764

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