The Popup Maker – Boost Sales, Conversions, Optins, Subscribers with the Ultimate WP Popup Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via post_title in all versions up to, and including, 1.24.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the attacker to create a post with an HTML entity-encoded payload in the title, which bypasses sanitize_text_field on save and is later decoded and executed by the browser when rendered by the Select2 component.
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 11
https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.22.0/classes/Admi…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.22.0/classes/Admi…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.22.0/classes/Help…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.22.0/dist/assets/…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.23.0/classes/Admi…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.23.0/classes/Admi…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.23.0/classes/Help…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.23.0/dist/assets/…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset/3690634/popup-maker/trunk/classes/…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset?reponame=&new=3690634%40popup-make…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/973b23c6-4edd-4f89-b5…
security@wordfence.com