CVE-2026-109989— Themify Popup <= 1.4.7 - Authenticated (Author+) Stored Cross-Site Scripting via 'popup_width_unit' Parameter
Quick assessment
Affected
themifyme Themify Popup
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 Themify Popup 插件在 1.4.7 及更早的所有版本中，由于输入清理和输出转义不足，存在通过 参数触发的存储型跨站脚本（Stored XSS）漏洞。这使得拥有作者级别或更高权限的已认证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。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-109989
Vulnerability Information
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Vulnerability Title
Themify Popup <= 1.4.7 - Authenticated (Author+) Stored Cross-Site Scripting via 'popup_width_unit' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Themify Popup plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'popup_width_unit' parameter in all versions up to, and including, 1.4.7 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected 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 |
|---|---|---|---|---|
| themifyme | Themify Popup | 0 ~ 1.4.7 | - |
|
II. Public POCs for CVE-2026-109989
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-109989 (5)
IV. Related Vulnerabilities
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V. Comments for CVE-2026-109989
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