The YS LeadGen plugin for WordPress is vulnerable to authorization bypass and Stored Cross-Site Scripting via multiple AJAX endpoints in all versions up to, and including, 2.1.4 due to missing capability checks on popup management actions. This makes it possible for authenticated attackers, with Subscriber-level access and above, to create arbitrary popups and inject malicious JavaScript that executes when the popup is displayed, leading to Stored XSS.
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
ysinnovations:ys leadgen – popup builder, popup maker & form builder for wordpress | lead generation, email marketing, sales, conversions, opt-ins & subscribers
References 5
https://plugins.trac.wordpress.org/browser/ysleadgen/tags/1.1.1/app/Controllers…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/ysleadgen/tags/1.1.1/app/Controllers…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/ysleadgen/tags/1.1.1/app/Controllers…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset/3577391
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/b62b8619-4348-4cf7-a5…
security@wordfence.com