CVE-2026-1256: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in ysinnovations YS LeadGen – Popup Builder, Popup Maker & Form Builder for WordPress | Lead Generation, Email Marketing, Sales, Conversions, Opt-Ins & Subscribers
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.
AI Analysis
Technical Summary
The YS LeadGen plugin for WordPress is affected by an authorization bypass and stored Cross-Site Scripting vulnerability (CWE-79) due to missing capability checks on popup management AJAX endpoints. Authenticated attackers with low-level privileges (Subscriber and above) can exploit this to create malicious popups containing JavaScript that executes in the context of users viewing the popup. This vulnerability affects all versions up to and including 2.1.4.
Potential Impact
An attacker with Subscriber-level access can inject and store malicious JavaScript code in popups, which executes when displayed to users. This can lead to session hijacking, defacement, or other client-side attacks. The vulnerability impacts confidentiality and integrity but does not affect availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict Subscriber-level access or disable the plugin if possible to mitigate risk. Monitor for vendor updates regarding an official fix.
CVE-2026-1256: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in ysinnovations YS LeadGen – Popup Builder, Popup Maker & Form Builder for WordPress | Lead Generation, Email Marketing, Sales, Conversions, Opt-Ins & Subscribers
Description
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.
CVSS v3.1
Score 6.4medium
Affected software
ysinnovations
YS LeadGen – Popup Builder, Popup Maker & Form Builder for WordPress | Lead Generation, Email Marketing, Sales, Conversions, Opt-Ins & Subscribers
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The YS LeadGen plugin for WordPress is affected by an authorization bypass and stored Cross-Site Scripting vulnerability (CWE-79) due to missing capability checks on popup management AJAX endpoints. Authenticated attackers with low-level privileges (Subscriber and above) can exploit this to create malicious popups containing JavaScript that executes in the context of users viewing the popup. This vulnerability affects all versions up to and including 2.1.4.
Potential Impact
An attacker with Subscriber-level access can inject and store malicious JavaScript code in popups, which executes when displayed to users. This can lead to session hijacking, defacement, or other client-side attacks. The vulnerability impacts confidentiality and integrity but does not affect availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict Subscriber-level access or disable the plugin if possible to mitigate risk. Monitor for vendor updates regarding an official fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-01-20T19:48:06.226Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aae488655bf5e2cf553a401
Added to database: 09/19/2026, 08:32:06 UTC
Last enriched: 09/19/2026, 08:47:00 UTC
Last updated: 09/19/2026, 22:12:52 UTC
Views: 10
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