CVE-2026-15798

Published: Aug 28, 2026Modified: Aug 28, 2026Deferred

6.4

Vector

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

Exploitability: 3.1 / Impact: 2.7

Source: security@wordfence.com (Secondary)

Description

The Smart Slider 3 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'slider' Block Attribute in all versions up to, and including, 3.5.1.38 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 injected scripts execute specifically when a user opens the affected post in the WordPress block editor, making Editors and Administrators the primary targets.

Related CWEs

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (9)

https://plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.34/Nextend/SmartSlider3/Platform/WordPress/Integration/Gutenberg/Gutenberg.php#L55

Source: security@wordfence.com

https://plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.34/Nextend/SmartSlider3/Platform/WordPress/Shortcode/Shortcode.php#L270

Source: security@wordfence.com

https://plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.34/Public/SmartSlider3/Platform/WordPress/Integration/Gutenberg/Assets/dist/gutenberg-block.js#L51

Source: security@wordfence.com

https://plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.38/Nextend/SmartSlider3/Platform/WordPress/Integration/Gutenberg/Gutenberg.php#L55

Source: security@wordfence.com

https://plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.38/Nextend/SmartSlider3/Platform/WordPress/Shortcode/Shortcode.php#L270

Source: security@wordfence.com

https://plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.38/Public/SmartSlider3/Platform/WordPress/Integration/Gutenberg/Assets/dist/gutenberg-block.js#L51

Source: security@wordfence.com

https://plugins.trac.wordpress.org/changeset/3654530/smart-slider-3/trunk/Public/SmartSlider3/Platform/WordPress/Integration/Gutenberg/Assets/dist/gutenberg-block.js

Source: security@wordfence.com

https://plugins.trac.wordpress.org/changeset?old_path=%2Fsmart-slider-3/tags/3.5.1.38&new_path=%2Fsmart-slider-3/tags/3.5.1.39

Source: security@wordfence.com

https://www.wordfence.com/threat-intel/vulnerabilities/id/d5c045e2-a6be-425f-a4f3-1e79badf738b?source=cve

Source: security@wordfence.com

Timeline

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