CVE-2026-18400 json
Slider, Gallery, and Carousel by MetaSlider <= 3.111.0 - Authenticated (Author+) Stored Cross-Site Scripting via 'delay' Post Meta Setting
published 2026-08-06 3 mo ago modified 2026-08-12 2 mo ago also EUVD-2026-53714
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 38%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.43% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- metaslider Slider, Gallery, and Carousel by MetaSlider – Image Slider, Video Slider
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/3f0082c6-c040-4244-be7b-b133fd24d093?source=cve
- plugins.trac.wordpress.org /browser/ml-slider/tags/3.111.0/inc/slider/metaslider.class.php#L660
- plugins.trac.wordpress.org /browser/ml-slider/tags/3.111.0/inc/slider/metaslider.class.php#L54
- plugins.trac.wordpress.org /browser/ml-slider/tags/3.111.0/ml-slider.php#L449
- plugins.trac.wordpress.org /browser/ml-slider/tags/3.111.0/inc/slider/metaslider.flex.class.php#L346
- plugins.trac.wordpress.org /browser/ml-slider/tags/3.111.0/ml-slider.php#L604
- plugins.trac.wordpress.org /browser/ml-slider/tags/3.106.0/inc/slider/metaslider.class.php#L660
- plugins.trac.wordpress.org /browser/ml-slider/tags/3.106.0/inc/slider/metaslider.class.php#L54
- plugins.trac.wordpress.org /browser/ml-slider/tags/3.106.0/ml-slider.php#L449
- plugins.trac.wordpress.org /browser/ml-slider/tags/3.106.0/inc/slider/metaslider.flex.class.php#L346
- plugins.trac.wordpress.org /browser/ml-slider/tags/3.106.0/ml-slider.php#L604
- plugins.trac.wordpress.org /changeset?old_path=%2Fml-slider/tags/3.111.0&new_path=%2Fml-slider/tags/3.111.1
- plugins.trac.wordpress.org /changeset/3633208/ml-slider/trunk/inc/slider/metaslider.class.php
Sources
- CVE List CVE-2026-18400
- NVD CVE-2026-18400
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.