CVE-2026-1256
YS LeadGen – Popups, Opt-ins & Lead Capture <= 2.1.4 - Missing Authorization to Authenticated (Subscriber+) Stored Cross-Site Scripting via User Input
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 |
| Vendor | ysinnovations |
| Product | ys leadgen – popup builder, popup maker & form builder for wordpress | lead generation, email marketing, sales, conversions, opt-ins & subscribers |
| Published | Sep 19, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
ysinnovations / YS LeadGen – Popup Builder, Popup Maker & Form Builder for WordPress | Lead Generation, Email Marketing, Sales, Conversions, Opt-Ins & Subscribers
0 ≤ 2.1.4
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/b62b8619-4348-4cf7-a572-aa6df20bdc3a?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/ysleadgen/tags/1.1.1/app/Controllers/Ajax.php#L37 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/ysleadgen/tags/1.1.1/app/Controllers/Ajax.php#L38 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/ysleadgen/tags/1.1.1/app/Controllers/Ajax.php#L36 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3577391
Credits
Athiwat Tiprasaharn (Jitlada) Itthidej Aramsri (Boeing777) Powpy Waris Damkham