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CVE-2025-13993
MailerLite – Signup forms (official) <= 1.7.16 - Authenticated (Administrator+) Stored Cross-Site Scripting
Medium5.5EPSS 0.34%
- Published
- Updated
- Reserved
- Assigned by
- Wordfence
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | Medium5.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Medium5.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.34% · top 72% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
mailerlite · MailerLite – Signup forms (official)
- affected ≤ 1.7.16
References (6)
- https://www.wordfence.com/threat-intel/vulnerabilities/id/8c37cc28-fde0-45c6-b49c-d6dfb296c4a5?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/official-mailerlite-sign-up-forms/tags/1.7.14/src/Controllers/AdminController.php#L179 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/official-mailerlite-sign-up-forms/tags/1.7.14/src/Controllers/AdminController.php#L224 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/official-mailerlite-sign-up-forms/tags/1.7.14/src/Views/CustomForm.php#L38 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/official-mailerlite-sign-up-forms/tags/1.7.14/src/Views/CustomForm.php#L94 (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset/3416100/official-mailerlite-sign-up-forms/trunk/src/Controllers/AdminController.php (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2025-13993)Record last updated .