The Meow Lightbox plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'display_name + comment' parameter in all versions up to, and including, 5.6.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability is only exploitable when the plugin's Output Buffering option is enabled (disabled by default), and requires the attacker to have at least one previously approved comment on the site so that subsequent comments are auto-approved by WordPress core.
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)
Vulnerable Products
tigroumeow:meow lightbox
References 11
https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/cor…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/cor…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/cor…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/classes/cor…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/vendor/kub-…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/vendor/kub-…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/vendor/kub-…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/meow-lightbox/tags/5.6.2/vendor/kub-…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset/3737480/meow-lightbox
security@wordfence.com
https://plugins.trac.wordpress.org/changeset/3737480/meow-lightbox/trunk/vendor…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/69de4c0b-fda4-4dd0-80…
security@wordfence.com