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5.4

Smart Slider 3 Plugin Exposes Sensitive Data to Contributors and Above

CVE-2026-4065 · published 7 months ago
Summary

The Smart Slider 3 plugin for WordPress has a security flaw that lets users with Contributor-level access and above see sensitive data and make changes to slider settings and images. This could lead to unauthorized changes to your website's content. Update to the latest version of the plugin to fix this issue.

Original advisory text
The Smart Slider 3 plugin for WordPress is vulnerable to unauthorized access and modification of data due to missing capability checks on multiple wp_ajax_smart-slider3 controller actions in all ve...
The Smart Slider 3 plugin for WordPress is vulnerable to unauthorized access and modification of data due to missing capability checks on multiple wp_ajax_smart-slider3 controller actions in all versions up to, and including, 3.5.1.33. The display_admin_ajax() method does not call checkForCap() (which requires unfiltered_html capability), and several controller actions only validate the nonce (validateToken()) without calling validatePermission(). This makes it possible for authenticated attackers, with Contributor-level access and above, to enumerate slider metadata and create, modify, and delete image storage records by obtaining the nextend_nonce exposed on post editor pages.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
5.4 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-862Missing Authorization
Timeline
Published7 Apr 2026
Updated4 Nov 2026
First seen7 Apr 2026
Sources
CVE-2026-4065 · NVD
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