CVE-2026-3253: CWE-862 Missing Authorization in mailerlite MailerLite – Signup forms (official)
The MailerLite – Signup forms (official) plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the forms() method of the AdminController class in all versions up to, and including, 1.7.21. This makes it possible for authenticated attackers, with Contributor-level access and above, to create or delete arbitrary signup forms.
AI Analysis
Technical Summary
CVE-2026-3253 describes a missing authorization vulnerability (CWE-862) in the MailerLite – Signup forms (official) WordPress plugin. The issue exists in all versions up to and including 1.7.21, where the forms() method in the AdminController class lacks proper capability checks. This allows authenticated users with Contributor-level privileges or higher to modify signup forms arbitrarily by creating or deleting them.
Potential Impact
An attacker with Contributor-level or higher access can modify signup forms arbitrarily, potentially disrupting form data and functionality. There is no direct impact on confidentiality or availability reported, but integrity of signup forms is compromised.
Mitigation Recommendations
No patch links or vendor advisories are provided, so patch status is not yet confirmed. Users should check the vendor advisory for current remediation guidance. Until a fix is available, restrict Contributor-level access where possible and monitor for unauthorized form modifications.
CVE-2026-3253: CWE-862 Missing Authorization in mailerlite MailerLite – Signup forms (official)
Description
The MailerLite – Signup forms (official) plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the forms() method of the AdminController class in all versions up to, and including, 1.7.21. This makes it possible for authenticated attackers, with Contributor-level access and above, to create or delete arbitrary signup forms.
CVSS v3.1
Score 4.3medium
Affected software
mailerlite
MailerLite – Signup forms (official)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-3253 describes a missing authorization vulnerability (CWE-862) in the MailerLite – Signup forms (official) WordPress plugin. The issue exists in all versions up to and including 1.7.21, where the forms() method in the AdminController class lacks proper capability checks. This allows authenticated users with Contributor-level privileges or higher to modify signup forms arbitrarily by creating or deleting them.
Potential Impact
An attacker with Contributor-level or higher access can modify signup forms arbitrarily, potentially disrupting form data and functionality. There is no direct impact on confidentiality or availability reported, but integrity of signup forms is compromised.
Mitigation Recommendations
No patch links or vendor advisories are provided, so patch status is not yet confirmed. Users should check the vendor advisory for current remediation guidance. Until a fix is available, restrict Contributor-level access where possible and monitor for unauthorized form modifications.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-02-26T11:29:13.850Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ab50e0cf7a7c5410644f2e7
Added to database: 09/24/2026, 11:48:28 UTC
Last enriched: 09/24/2026, 12:03:10 UTC
Last updated: 09/25/2026, 03:22:20 UTC
Views: 12
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