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CVE-2026-4065

5.4 · MEDIUM

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…

Published Apr 7, 2026CWE-862EPSS 0.32%

Overview

CVE-2026-4065 is a medium-severity vulnerability. It was published on April 7, 2026 and has a CVSS 3.1 base score of 5.4 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.4, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refplugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.32/Nextend/Framework/Image/ControllerAjaxImage.php#L37Refplugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.32/Nextend/SmartSlider3/Application/Admin/Sliders/ControllerAjaxSliders.php#L26Refplugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.32/Nextend/SmartSlider3/Platform/WordPress/Admin/AdminHelper.php#L155Refplugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.32/Nextend/SmartSlider3/Platform/WordPress/HelperTinyMCE.php#L30Refplugins.trac.wordpress.org/browser/smart-slider-3/trunk/Nextend/SmartSlider3/Platform/WordPress/Admin/AdminHelper.php#L155Refplugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3489689%40smart-slider-3%2Ftrunk&old=3439582%40smart-slider-3%2Ftrunk&sfp_email=&sfph_mail=Refwww.wordfence.com/threat-intel/vulnerabilities/id/53a08b59-b7e0-419a-bfc3-528bcddb1ac2?source=cve

How CyberStrike helps

Frequently asked questions

What is CVE-2026-4065?

CVE-2026-4065 is a medium-severity vulnerability. It was published on April 7, 2026 and has a CVSS 3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2026-4065?

This vulnerability has a CVSS 3.1 base score of 5.4, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-4065?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-4065?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-4065 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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