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CVE-2026-6742— Advanced iFrame <= 2026.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Gutenberg Block 'additional' Attribute

Quick assessment

Affected
mdempfle Advanced iFrame
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 Advanced iFrame plugin是WordPress基金会的一个内容管理系统组件。 WordPress Advanced iFrame 2026.1及之前版本存在跨站脚本漏洞，该漏洞源于对'additional'参数输入清理和输出转义不足，可能导致经过身份验证的攻击者（具有贡献者级别及以上权限）在页面中注入任意Web脚本，当用户访问被注入的页面时执行。

CVSS 6.4 · Medium EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
mdempfle Advanced iFrame ≤ 2026.1 affected
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I. Basic Information for CVE-2026-6742

Vulnerability Information
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Vulnerability Title
Advanced iFrame <= 2026.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Gutenberg Block 'additional' Attribute
Source: CVE Program / CVE List V5
Vulnerability Description
The Advanced iFrame plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'additional' parameter in all versions up to, and including, 2026.1 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
Vulnerability Title
WordPress Advanced iFrame 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Advanced iFrame plugin是WordPress基金会的一个内容管理系统组件。 WordPress Advanced iFrame 2026.1及之前版本存在跨站脚本漏洞，该漏洞源于对'additional'参数输入清理和输出转义不足，可能导致经过身份验证的攻击者（具有贡献者级别及以上权限）在页面中注入任意Web脚本，当用户访问被注入的页面时执行。
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
mdempfle Advanced iFrame 0 ~ 2026.1 -

II. Public POCs for CVE-2026-6742

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III. Intelligence Information for CVE-2026-6742

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Patches & Fixes for CVE-2026-6742 (1)

Vendor Advisories for CVE-2026-6742 (1)

IV. Related Vulnerabilities

Same product: Advanced iFrame
Same vendor: mdempfle
Same weakness: CWE-79

V. Comments for CVE-2026-6742

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