CVE-2026-6178: Betheme <= 28.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'icon_box_2' Shortcode

Severity: medium (CVSS 6.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-26 · updated 2026-08-26
Weakness: CWE-79

Description

The Betheme theme for WordPress is vulnerable to Stored Cross-Site Scripting via the theme's 'icon_box_2' shortcode in all versions up to, and including, 28.4 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

MuffinGroup Betheme: through 28.4

References

https://plugins.trac.wordpress.org/browser/betheme/tags/28.3.3/functions/theme-shortcodes.php#L11651
https://plugins.trac.wordpress.org/browser/betheme/tags/28.3.3/functions/theme-shortcodes.php#L11719
https://plugins.trac.wordpress.org/browser/betheme/tags/28.3.3/functions/theme-shortcodes.php#L11840
https://plugins.trac.wordpress.org/browser/betheme/trunk/functions/theme-shortcodes.php#L11651
https://plugins.trac.wordpress.org/browser/betheme/trunk/functions/theme-shortcodes.php#L11719
https://plugins.trac.wordpress.org/browser/betheme/trunk/functions/theme-shortcodes.php#L11840
https://support.muffingroup.com/changelog/
https://www.wordfence.com/threat-intel/vulnerabilities/id/686dd63b-5471-4654-8009-e3ab648f8b86?source=cve

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