CVE-2025-13993CWE-79cross-site-scripting

CVE-2025-13993

Medium · published December 12, 2025

CVSS v3.1
5.5
EPSS
0%
Percentile
26.6
In the wild
Unconfirmed
What it is

The MailerLite – Signup forms (official) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'form_description' and 'success_message' parameters in versions up to, and including, 1.7.16 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator access or higher, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00343 · 26.6th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2025-12-12T15:15Z
References (6)
https://plugins.trac.wordpress.org/browser/official-mailerlite-sign-up-forms/tags/1.7.14/src/Controllers/AdminController.php#L179 · [email protected]https://plugins.trac.wordpress.org/browser/official-mailerlite-sign-up-forms/tags/1.7.14/src/Controllers/AdminController.php#L224 · [email protected]https://plugins.trac.wordpress.org/browser/official-mailerlite-sign-up-forms/tags/1.7.14/src/Views/CustomForm.php#L38 · [email protected]https://plugins.trac.wordpress.org/browser/official-mailerlite-sign-up-forms/tags/1.7.14/src/Views/CustomForm.php#L94 · [email protected]https://plugins.trac.wordpress.org/changeset/3416100/official-mailerlite-sign-up-forms/trunk/src/Controllers/AdminController.php · [email protected]https://www.wordfence.com/threat-intel/vulnerabilities/id/8c37cc28-fde0-45c6-b49c-d6dfb296c4a5?source=cve · [email protected]
EPSS history
Timeline
  • 12 DEC 09:20Z
    MailerLite – Signup forms (official) <= 1.7.16 - Authenticated (Administrator+) Stored Cross-Site Scripting
    cvelistv5