CVE-2026-12801— Ultra Addons for Contact Form 7 <= 3.5.43 - Authenticated (Contributor+) Stored Cross-Site Scripting via Slider Attributes
Quick assessment
Affected
themefic Ultra Addons for Contact Form 7
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 “Ultra Addons for Contact Form 7” 插件存在存储型跨站脚本（Stored XSS）漏洞。该漏洞影响所有 3.5.43 及之前版本，原因是插件对 Range Slider（范围滑块）组件中的 和 属性缺乏充分的输入净化（input sanitization）和输出转义（output escaping）。这使得具备贡献者（contributor）及以上权限的已认证攻击者能够在网页中注入任意 Web 脚本，当其他用户访问被注入的页面时，这些恶意脚本将会执行。
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| themefic | Ultra Addons for Contact Form 7 | ≤ 3.5.43 |
affected |
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I. Basic Information for CVE-2026-12801
Vulnerability Information
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Vulnerability Title
Ultra Addons for Contact Form 7 <= 3.5.43 - Authenticated (Contributor+) Stored Cross-Site Scripting via Slider Attributes
Source: CVE Program / CVE List V5
Vulnerability Description
The Ultra Addons for Contact Form 7 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Range Slider 'data-label' and 'data-separator' attributes in all versions up to, and including, 3.5.43 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-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 |
|---|---|---|---|---|
| themefic | Ultra Addons for Contact Form 7 | 0 ~ 3.5.43 | - |
|
II. Public POCs for CVE-2026-12801
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-12801 (1)
Other References for CVE-2026-12801 (1)
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