CVE-2026-15798
Smart Slider 3 <= 3.5.1.38 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'slider' Block Attribute
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 |
| Vendor | nextendweb |
| Product | smart slider 3 |
| Published | Aug 28, 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
nextendweb / Smart Slider 3
0 ≤ 3.5.1.38
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/d5c045e2-a6be-425f-a4f3-1e79badf738b?source=cve plugins.trac.wordpress.org: 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 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.38/Nextend/SmartSlider3/Platform/WordPress/Integration/Gutenberg/Gutenberg.php#L55 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.38/Nextend/SmartSlider3/Platform/WordPress/Shortcode/Shortcode.php#L270 plugins.trac.wordpress.org: 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 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.34/Nextend/SmartSlider3/Platform/WordPress/Integration/Gutenberg/Gutenberg.php#L55 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.34/Nextend/SmartSlider3/Platform/WordPress/Shortcode/Shortcode.php#L270 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3654530/smart-slider-3/trunk/Public/SmartSlider3/Platform/WordPress/Integration/Gutenberg/Assets/dist/gutenberg-block.js plugins.trac.wordpress.org: 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
Credits
Dmitrii Ignatyev