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Description

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.

PUBLISHED Reserved 2025-12-03 | Published 2025-12-12 | Updated 2025-12-12 | Assigner Wordfence




MEDIUM: 5.5CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status
unaffected

* (semver)
affected

Timeline

2025-12-09:Vendor Notified
2025-12-11:Disclosed

Credits

NosleeP finder

References

www.wordfence.com/...-fde0-45c6-b49c-d6dfb296c4a5?source=cve

plugins.trac.wordpress.org/...ontrollers/AdminController.php

plugins.trac.wordpress.org/...ontrollers/AdminController.php

plugins.trac.wordpress.org/....7.14/src/Views/CustomForm.php

plugins.trac.wordpress.org/....7.14/src/Views/CustomForm.php

plugins.trac.wordpress.org/...ontrollers/AdminController.php

cve.org (CVE-2025-13993)

nvd.nist.gov (CVE-2025-13993)

Download JSON

Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.