CVE-2026-1256
CVE-2026-1256
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (28.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/b62b8619-4348-4cf7-a572-aa6df…
- plugins.trac.wordpress.org/browser/ysleadgen/tags/1.1.1/app/Controllers/Ajax.php
- plugins.trac.wordpress.org/browser/ysleadgen/tags/1.1.1/app/Controllers/Ajax.php
- plugins.trac.wordpress.org/browser/ysleadgen/tags/1.1.1/app/Controllers/Ajax.php
- plugins.trac.wordpress.org/changeset/3577391
Frequently asked questions
- What is CVE-2026-1256?
- CVE-2026-1256 is a medium-severity vulnerability, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-09-19.
- How severe is CVE-2026-1256?
- Medium severity. CVSS v3 base score is 6.4 out of 10.