Missing authorization in MailerLite – Signup forms
Priority LOW 19CWE-862Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00188 8th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| MailerLite | MailerLite – Signup forms (official) | up to 1.7.21 | — | No fix listed | CNA |
- MailerLite – Signup forms (official) VendorMailerLite Affected up to 1.7.21 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-3253
- 2026-10-03 Alias added: GHSA-h68w-8j2h-7hvq
References
More MailerLite vulnerabilities
- TI-2025-41554 WordPress MailerLite – WooCommerce integration plugin <= 3.1.2 - SQL Injection vulnerability CVSS 3.1CRITICAL 9.3
- TI-2022-14630 WordPress MailerLite – Signup forms (official) plugin <= 1.5.7 - Cross-Site Request Forgery (CSRF) vulnerability CVSS 3.1HIGH 8.8
- TI-2023-28651 WordPress MailerLite – WooCommerce integration Plugin <= 2.0.8 is vulnerable to Cross Site Request Forgery (CSRF) CVSS 3.1HIGH 8.8
- TI-2024-02608 MailerLite – Signup forms (official) <= 1.7.6 - Missing Authorization CVSS 3.1MEDIUM 5.3
- TI-2026-00754 MailerLite - WooCommerce integration <= 3.1.3 - Missing Authorization to Data Deletion CVSS 3.1MEDIUM 6.5
- TI-2024-01293 The MailerLite – Signup forms (official) plugin for WordPress is vulnerable to Stored… CVSS 3.1MEDIUM 6.4
Sources
- CVE-2026-3253 · CVE Program
- CVE-2026-3253 · NVD
- FIRST EPSS
- GHSA-h68w-8j2h-7hvq · GitHub Advisory Database · CC BY 4.0
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