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CVE-2026-15273— Automatic.css 4.0.0 - Unauthenticated Stored Cross-Site Scripting via REQUEST_URI

Quick assessment

Affected
Automatic.css Automatic.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 Automatic.css 插件在所有 4.0.0 版本中存在存储型跨站脚本漏洞（Stored Cross-Site Scripting, XSS），该漏洞源于 REQUEST_URI 参数缺乏足够的输入清洗和输出转义处理。这使得未经身份验证的攻击者能够注入任意的 Web 脚本，每当管理员访问“活动日志”设置页面时，这些脚本便会自动执行。

CVSS 6.4 · Medium EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1059.001 · PowerShell

Affected Version Matrix 1

VendorProduct Version RangeStatus
Automatic.css Automatic.css 4.0.0 affected
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I. Basic Information for CVE-2026-15273

Vulnerability Information
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Vulnerability Title
Automatic.css 4.0.0 - Unauthenticated Stored Cross-Site Scripting via REQUEST_URI
Source: CVE Program / CVE List V5
Vulnerability Description
The Automatic.css plugin for WordPress is vulnerable to Stored Cross-Site Scripting via REQUEST_URI in all version 4.0.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that will execute whenever an administrator accesses the Activity Log settings page.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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
Automatic.css Automatic.css 4.0.0 -

II. Public POCs for CVE-2026-15273

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III. Intelligence Information for CVE-2026-15273

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Patches & Fixes for CVE-2026-15273 (2)

News Coverage for CVE-2026-15273 (1)

Other References for CVE-2026-15273 (1)

IV. Related Vulnerabilities

Same weakness: CWE-79