CVE-2026-6742CWE-79

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

Medium · published July 8, 2026

CVSS v3.1
6.4
EPSS
0%
Percentile
16.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00261 · 16.9th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-07-08T11:35Z
EPSS history
Timeline
  • 08 JUL 11:35Z
    Advanced iFrame <= 2026.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Gutenberg Block 'additional' Attribute
    cvelistv5