Missing authorization in nextendweb Smart Slider 3
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| nextendweb | Smart Slider 3 | up to 3.5.1.33 | — | No fix listed | CNA |
- Smart Slider 3 Vendornextendweb Affected up to 3.5.1.33 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-4065
- 2026-10-03 Alias added: GHSA-m7hj-m974-fx49
References
Other 7
- https://www.wordfence.com/threat-intel/vulnerabilities/id/53a08b59-b7e0-419a-bfc3-528bcddb1ac2?source=cve
- https://plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.32/Nextend/SmartSlider3/Platform/WordPress/Admin/AdminHelper.php#L155
- https://plugins.trac.wordpress.org/browser/smart-slider-3/trunk/Nextend/SmartSlider3/Platform/WordPress/Admin/AdminHelper.php#L155
- https://plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.32/Nextend/SmartSlider3/Application/Admin/Sliders/ControllerAjaxSliders.php#L26
- https://plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.32/Nextend/Framework/Image/ControllerAjaxImage.php#L37
- https://plugins.trac.wordpress.org/browser/smart-slider-3/tags/3.5.1.32/Nextend/SmartSlider3/Platform/WordPress/HelperTinyMCE.php#L30
- https://plugins.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=
More nextendweb vulnerabilities
- TI-2022-03102 Smart Slider 3 < 3.5.1.11 - PHP Object Injection CVSS 3.1HIGH 8.8
- TI-2023-00625 Smart Slider 3 < 3.5.1.14 - Contributor+ Stored XSS CVSS 3.1MEDIUM 5.4
- TI-2025-00900 Nextend Social Login Pro <= 3.1.16 - Authentication Bypass via Apple OAuth provider CVSS 3.1CRITICAL 9.8
- TI-2024-09179 Nextend Social Login Pro <= 3.1.14 - Authentication Bypass via WordPress.com OAuth provider CVSS 3.1CRITICAL 9.8
- TI-2026-26699 Smart Slider 3 Pro 3.5.1.35 Supply Chain Attack Remote Access Toolkit CVSS 4.0CRITICAL 9.3
- TI-2022-22647 WordPress Smart Slider 3 Plugin <= 3.5.1.9 is vulnerable to PHP Object Injection CVSS 3.1HIGH 8.8
Sources
- CVE-2026-4065 · CVE Program
- CVE-2026-4065 · NVD
- FIRST EPSS
- GHSA-m7hj-m974-fx49 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences