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CVE-2026-15798

Smart Slider 3 <= 3.5.1.38 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'slider' Block Attribute

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.

CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
Vendors
Nextendweb Wordpress
Products
Smart Slider 3 Wordpress
CVE-2026-12385

Smart Slider 3 <= 3.5.1.37 - Missing Authorization to Authenticated (Contributor+) Sensitive Information Exposure via WP_Query Parameter Injection via 'keyword' Parameter

The Smart Slider 3 plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 3.5.1.37 via the 'keyword' parameter. This makes it possible for authenticated attackers, with contributor-level access and above, to extract titles and full content excerpts of private, draft, pending, trashed, and auto-draft posts authored by any user, including Administrators and Editors. The required nonce is emitted on /wp-admin/post-new.php, which is accessible to Contributor-level users via the edit_posts capability, meaning any Contributor can obtain the nonce needed to trigger the injection.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Nextendweb Wordpress
Products
Smart Slider 3 Wordpress
CVE-2026-9197

Smart Slider 3 <= 3.5.1.36 - Authenticated (Administrator+) Path Traversal to Arbitrary File Read via 'src'/'srcset' Attribute in HTML Export

The Smart Slider 3 plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 3.5.1.36 via the replaceHTMLImage function. This makes it possible for authenticated attackers, with administrator-level access and above, to read the contents of arbitrary files on the server, which can contain sensitive information.

CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
Vendors
Nextendweb Wordpress
Products
Smart Slider 3 Wordpress
CVE-2022-45845

WordPress Smart Slider 3 Plugin <= 3.5.1.9 is vulnerable to PHP Object Injection

Deserialization of Untrusted Data vulnerability in Nextend Smart Slider 3.This issue affects Smart Slider 3: from n/a through 3.5.1.9.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Nextendweb
Products
Smart Slider 3
CVE-2026-3098

Smart Slider 3 <= 3.5.1.33 - Authenticated (Subscriber+) Arbitrary File Read via actionExportAll

The Smart Slider 3 plugin for WordPress is vulnerable to Arbitrary File Read in all versions up to, and including, 3.5.1.33 via the 'actionExportAll' function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to read the contents of arbitrary files on the server, which can contain sensitive information.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Nextendweb Wordpress
Products
Smart Slider 3 Wordpress
CVE-2025-6348

Smart Slider 3 <= 3.5.1.28 - Authenticated (Administrator+) SQL Injection via `sliderid` Parameter

The Smart Slider 3 plugin for WordPress is vulnerable to time-based SQL Injection via the ‘sliderid’ parameter in all versions up to, and including, 3.5.1.28 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with Administrator-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
Vendors
Nextendweb Wordpress
Products
Smart Slider 3 Wordpress
CVE-2026-34424

Smart Slider 3 Pro 3.5.1.35 Supply Chain Attack Remote Access Toolkit

Smart Slider 3 Pro version 3.5.1.35 for WordPress and Joomla contains a multi-stage remote access toolkit injected through a compromised update system that allows unauthenticated attackers to execute arbitrary code and commands. Attackers can trigger pre-authentication remote shell execution via HTTP headers, establish authenticated backdoors accepting arbitrary PHP code or OS commands, create hidden administrator accounts, exfiltrate credentials and access keys, and maintain persistence through multiple injection points including must-use plugins and core file modifications.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Vendors
Nextendweb Wordpress
Products
Smart Slider 3 Wordpress
CVE-2024-3027

Smart Slider 3 <= 3.5.1.22 - Missing Authorization to Limited File Upload

The Smart Slider 3 plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the upload function in all versions up to, and including, 3.5.1.22. This makes it possible for authenticated attackers, with contributor-level access and above, to upload files, including SVG files, which can be used to conduct stored cross-site scripting attacks.

CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
Vendors
Nextendweb Wordpress
Products
Smart Slider 3 Wordpress
CVE-2026-4065

Smart Slider 3 <= 3.5.1.33 - Missing Authorization to Authenticated (Contributor+) Slider Data Read and Image Record Manipulation

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.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Vendors
Nextendweb Wordpress
Products
Smart Slider 3 Wordpress
CVE-2022-3357

Smart Slider 3 < 3.5.1.11 - PHP Object Injection

The Smart Slider 3 WordPress plugin before 3.5.1.11 unserialises the content of an imported file, which could lead to PHP object injection issues when a user import (intentionally or not) a malicious file, and a suitable gadget chain is present on the site.

CVSS 3.1 · 8.8 High EPSS 2.5% KEV · Not listed
Vendors
Nextendweb
Products
Smart Slider 3
CVE-2023-0660

Smart Slider 3 < 3.5.1.14 - Contributor+ Stored XSS

The Smart Slider 3 WordPress plugin before 3.5.1.14 does not properly validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Vendors
Nextendweb
Products
Smart Slider 3
CVE-2022-45843

WordPress Smart Slider 3 Plugin <= 3.5.1.9 is vulnerable to Cross Site Scripting (XSS)

Auth. (contributor+) Stored Cross-Site Scripting vulnerability in Nextend Smart Slider 3 plugin <= 3.5.1.9 versions.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Vendors
Nextendweb
Products
Smart Slider 3