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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 13
https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.106.0/inc/slider/me…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.106.0/inc/slider/me…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.106.0/inc/slider/me…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.106.0/ml-slider.php…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.106.0/ml-slider.php…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.111.0/inc/slider/me…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.111.0/inc/slider/me…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.111.0/inc/slider/me…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.111.0/ml-slider.php…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/ml-slider/tags/3.111.0/ml-slider.php…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset/3633208/ml-slider/trunk/inc/slider…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset?old_path=%2Fml-slider/tags/3.111.0…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/3f0082c6-c040-4244-be…
security@wordfence.com