nextendweb Smart Slider 3 Plugin up to 3.5.1.33 on WordPress display_admin_ajax authorization

Summaryinfo

A vulnerability was found in nextendweb Smart Slider 3 Plugin up to 3.5.1.33 on WordPress and classified as critical. Impacted is the function display_admin_ajax. Executing a manipulation can lead to authorization. The identification of this vulnerability is CVE-2026-4065. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in nextendweb Smart Slider 3 Plugin up to 3.5.1.33 on WordPress and classified as critical. This vulnerability affects the function display_admin_ajax. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was shared by darkestmode. The advisory is available at wordfence.com. This vulnerability was named CVE-2026-4065 since 03/12/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 04/08/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-19956). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• WordPress Plugin

Vendor

• nextendweb

Name

• Smart Slider 3 Plugin

Version

• 3.5.1.0
• 3.5.1.1
• 3.5.1.2
• 3.5.1.3
• 3.5.1.4
• 3.5.1.5
• 3.5.1.6
• 3.5.1.7
• 3.5.1.8
• 3.5.1.9
• 3.5.1.10
• 3.5.1.11
• 3.5.1.12
• 3.5.1.13
• 3.5.1.14
• 3.5.1.15
• 3.5.1.16
• 3.5.1.17
• 3.5.1.18
• 3.5.1.19
• 3.5.1.20
• 3.5.1.21
• 3.5.1.22
• 3.5.1.23
• 3.5.1.24
• 3.5.1.25
• 3.5.1.26
• 3.5.1.27
• 3.5.1.28
• 3.5.1.29
• 3.5.1.30
• 3.5.1.31
• 3.5.1.32
• 3.5.1.33

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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