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.
References7
- plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.32…
- plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.32…
- plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.32…
- plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.32…
- plugins.trac.wordpress.org/browser/smart-slider-3/trunk/Nextend…
- plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&repo…
- www.wordfence.com/threat-intel/vulnerabilities/id/53a08b59-b7e0…
Metrics
- CVSS 3.1
-
5.4
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 31 · as of 12 November 2026
- CWE
- CWE-862
Could this be exploited in your environment?
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