CVE-2025-6987: Advanced iFrame <= 2025.5 - Authenticated (Contributor+) Stored Cross-Site Scripting

Severity: medium (CVSS 6.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-07-26 · updated 2026-06-17
Weakness: CWE-79

Description

The Advanced iFrame plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'advanced_iframe' shortcode in all versions up to, and including, 2025.5 due to insufficient input sanitization and output escaping on user supplied attributes. 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.

Affected products

mdempfle Advanced iFrame: through 2025.5

References

https://plugins.trac.wordpress.org/browser/advanced-iframe/trunk/advanced-iframe.php#L725
https://plugins.trac.wordpress.org/browser/advanced-iframe/trunk/includes/advanced-iframe-main-iframe.php#L419
https://plugins.trac.wordpress.org/browser/advanced-iframe/trunk/includes/advanced-iframe-main-read-config.php
https://plugins.trac.wordpress.org/changeset/3329909/advanced-iframe/trunk/includes/advanced-iframe-main-read-config.php
https://www.wordfence.com/threat-intel/vulnerabilities/id/6acb99eb-d61c-4d1f-b399-32db07c7e3e7?source=cve

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