CVE-2026-96649CWE-79cross-site-scripting

CVE-2026-96649

High · published September 30, 2026

CVSS v3.1
7.2
EPSS
0%
Percentile
15.1
In the wild
Unconfirmed
What it is

The Frontend Post Submission Manager Lite – Frontend Posting WordPress Plugin plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via post_content Parameter (data-label DOM Sink) in all versions up to, and including, 1.3.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the site operator to have enabled guest post submission via the [fpsm] shortcode, which registers a publicly accessible AJAX handler gated only by a nonce emitted on every page containing the shortcode.

The record
Technical detail
CVSS v3.1
7.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00247 · 15.1th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-30T07:17Z
References (8)
https://plugins.trac.wordpress.org/browser/frontend-post-submission-manager-lite/tags/1.3.4/assets/js/fpsml-fileuploader.js#L578 · [email protected]https://plugins.trac.wordpress.org/browser/frontend-post-submission-manager-lite/tags/1.3.4/assets/js/fpsml-fileuploader.js#L583 · [email protected]https://plugins.trac.wordpress.org/browser/frontend-post-submission-manager-lite/tags/1.3.4/assets/js/fpsml-frontend.js#L40 · [email protected]https://plugins.trac.wordpress.org/browser/frontend-post-submission-manager-lite/tags/1.3.4/includes/classes/class-fpsml-library.php#L112 · [email protected]https://plugins.trac.wordpress.org/browser/frontend-post-submission-manager-lite/tags/1.3.4/includes/cores/ajax-process-form.php#L161 · [email protected]https://plugins.trac.wordpress.org/browser/frontend-post-submission-manager-lite/tags/1.3.4/includes/cores/ajax-process-form.php#L5 · [email protected]https://plugins.trac.wordpress.org/browser/frontend-post-submission-manager-lite/tags/1.3.5/ · [email protected]https://www.wordfence.com/threat-intel/vulnerabilities/id/0af8ff06-68e2-4a0c-9de4-d06a6a2e86c9?source=cve · [email protected]
EPSS history
Timeline
  • 01 OCT 03:50Z
    EPSS moved — → 0%
    epss
  • 30 SEP 02:27Z
    Frontend Post Submission Manager Lite <= 1.3.4 - Unauthenticated Stored DOM-Based Cross-Site Scripting via post_content Parameter (data-label DOM Sink)
    cvelistv5