CVE-2026-4065: CWE-862 Missing Authorization in nextendweb Smart Slider 3
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.
AI Analysis
Technical Summary
CVE-2026-4065 describes a missing authorization (CWE-862) vulnerability in the nextendweb Smart Slider 3 WordPress plugin. Multiple wp_ajax_smart-slider3 controller actions fail to perform required capability checks, specifically the display_admin_ajax() method does not call checkForCap(), and several actions validate only the nonce without validating permissions. This allows authenticated users with Contributor-level privileges or higher to enumerate slider metadata and create, modify, or delete image storage records by leveraging the nextend_nonce exposed on post editor pages. The vulnerability affects all versions up to and including 3.5.1.33. The CVSS 3.1 base score is 5.4, reflecting a network attack vector with low complexity, requiring privileges, no user interaction, and limited confidentiality and integrity impact.
Potential Impact
Authenticated users with Contributor-level access or higher can bypass intended authorization controls to enumerate and manipulate slider metadata and image storage records within the Smart Slider 3 plugin. This could lead to unauthorized modification or deletion of slider content. The impact is limited to confidentiality and integrity with no availability impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — no official fix or vendor advisory is currently available. Until a patch is released, restrict Contributor-level access where possible and monitor for plugin updates from nextendweb. Avoid granting unnecessary privileges to users and consider disabling or removing the Smart Slider 3 plugin if it is not essential.
CVE-2026-4065: CWE-862 Missing Authorization in nextendweb Smart Slider 3
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-4065 describes a missing authorization (CWE-862) vulnerability in the nextendweb Smart Slider 3 WordPress plugin. Multiple wp_ajax_smart-slider3 controller actions fail to perform required capability checks, specifically the display_admin_ajax() method does not call checkForCap(), and several actions validate only the nonce without validating permissions. This allows authenticated users with Contributor-level privileges or higher to enumerate slider metadata and create, modify, or delete image storage records by leveraging the nextend_nonce exposed on post editor pages. The vulnerability affects all versions up to and including 3.5.1.33. The CVSS 3.1 base score is 5.4, reflecting a network attack vector with low complexity, requiring privileges, no user interaction, and limited confidentiality and integrity impact.
Potential Impact
Authenticated users with Contributor-level access or higher can bypass intended authorization controls to enumerate and manipulate slider metadata and image storage records within the Smart Slider 3 plugin. This could lead to unauthorized modification or deletion of slider content. The impact is limited to confidentiality and integrity with no availability impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — no official fix or vendor advisory is currently available. Until a patch is released, restrict Contributor-level access where possible and monitor for plugin updates from nextendweb. Avoid granting unnecessary privileges to users and consider disabling or removing the Smart Slider 3 plugin if it is not essential.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-03-12T17:41:32.556Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d5779eaaed68159a6ad78a
Added to database: 4/7/2026, 9:31:10 PM
Last enriched: 4/7/2026, 9:46:25 PM
Last updated: 4/8/2026, 1:52:08 AM
Views: 7
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