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

CVSS 6.4 · Medium EPSS 0.16% · P5 Updated Jul 08, 2026

Possible ATT&CK Techniques 1AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

Vendor	Product	Version Range	Status
mdempfle	Advanced iFrame	`≤ 2026.1`	affected

Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-6742

Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

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

Source: NVD (National Vulnerability Database)

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: NVD (National Vulnerability Database)

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Source: NVD (National Vulnerability Database)

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: NVD (National Vulnerability Database)

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

#	POC Description	Source Link	Shenlong Link

AI-Generated POCPremium

No public POC found.

III. Intelligence Information for CVE-2026-6742

请登录查看更多情报信息。

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

🔗 Changeset 3558422 for advanced-iframe – WordPress Plugin Repository

Vendor Advisories for CVE-2026-6742 (1)

🔗 https://www.wordfence.com/threat-intel/vulnerabilities/id/2b9c4ca8-e5cd-4c4f-8d81-b06367c89fd7?source=cve Read full article

https://nvd.nist.gov/vuln/detail/CVE-2026-6742

IV. Related Vulnerabilities

Same product: Advanced iFrame

Same vendor: mdempfle

Same weakness: CWE-79

V. Comments for CVE-2026-6742

No comments yet

Goal Reached Thanks to every supporter — we hit 100%!

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

Possible ATT&CK Techniques 1AI

Affected Version Matrix 1

I. Basic Information for CVE-2026-6742

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2026-6742

III. Intelligence Information for CVE-2026-6742

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

Vendor Advisories for CVE-2026-6742 (1)

IV. Related Vulnerabilities

V. Comments for CVE-2026-6742

Leave a comment