CVE-2026-6742

MEDIUM 6.4

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

CVSS Score

6.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	mdempfle
Product	advanced iframe
Published	Jul 8, 2026
Last Updated	Jul 8, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

mdempfle / Advanced iFrame

0 ≤ 2026.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/2b9c4ca8-e5cd-4c4f-8d81-b06367c89fd7?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3558422/advanced-iframe

Credits

Osvaldo Noe Gonzalez Del Rio (Os)