CVE-2026-18400
Slider, Gallery, and Carousel by MetaSlider <= 3.111.0 - Authenticated (Author+) Stored Cross-Site Scripting via 'delay' Post Meta Setting
- Published
- Updated
- Reserved
- Assigned by
- Wordfence
Description
The Slider, Gallery, and Carousel by MetaSlider – Image Slider, Video Slider plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'delay' Post Meta Setting in all versions up to, and including, 3.111.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The ml-slider custom post type is registered without custom capability restrictions and the ml-slider_settings meta key is unprotected, allowing Author-level users to set the malicious delay value via XML-RPC custom_fields when creating an ml-slider post.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | Medium6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Medium6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.43% · top 62% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.4.
Weakness
Affected products
metaslider · Slider, Gallery, and Carousel by MetaSlider – Image Slider, Video Slider
- affected ≤ 3.111.0
References (13)
- https://www.wordfence.com/threat-intel/vulnerabilities/id/3f0082c6-c040-4244-be7b-b133fd24d093?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.111.0/inc/slider/metaslider.class.php#L660 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.111.0/inc/slider/metaslider.class.php#L54 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.111.0/ml-slider.php#L449 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.111.0/inc/slider/metaslider.flex.class.php#L346 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.111.0/ml-slider.php#L604 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.106.0/inc/slider/metaslider.class.php#L660 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.106.0/inc/slider/metaslider.class.php#L54 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.106.0/ml-slider.php#L449 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.106.0/inc/slider/metaslider.flex.class.php#L346 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.106.0/ml-slider.php#L604 (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset?old_path=%2Fml-slider/tags/3.111.0&new_path=%2Fml-slider/tags/3.111.1 (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset/3633208/ml-slider/trunk/inc/slider/metaslider.class.php (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-18400)Record last updated .