MailerLite – Signup forms (official) <= 1.7.18 — Missing Authorization
CVE-2026-25420Published · Updated Action summary
Affected: ≤1.7.18Update to 1.7.19 or newer
All remediation steps- Severity
- Medium4.3
- CVSS
- 4.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:UScope- Unchanged
C:NConfidentiality- None
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-862 Missing Authorization
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
MailerLite – Signup forms (official) official-mailerlite-sign-up-forms
- Affected≤ 1.7.18
- Patched in1.7.19
Update to 1.7.19 or newer.
You are affected if you run ≤ 1.7.18. Version 1.7.19 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under MailerLite – Signup forms (official).
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 1.7.19, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch MailerLite – Signup forms (official) to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to daroo.
The MailerLite – Signup forms (official) plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on a function in all versions up to, and including, 1.7.18. This makes it possible for authenticated attackers, with Contributor-level access and above, to perform an unauthorized action.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in MailerLite – Signup forms (official)
All 9| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium4.3 | Missing Authorization to Authenticated (Contributor+) Form Creation and Deletion ≤1.7.21Update to 1.7.22 | CVE-2026-3253 | |
| Medium5.5 | Authenticated (Administrator+) Stored Cross-Site Scripting ≤1.7.16Update to 1.7.17 | CVE-2025-13993 | |
| Medium6.4 | 1.7.6 - Authenticated (Contributor+) Stored Cross-Site Scripting 1.5.0 – 1.7.6Update to 1.7.7 | CVE-2024-1386 | |
| Medium5.3 | Missing Authorization ≤1.7.6Update to 1.7.7 | CVE-2024-2797 | |
| High8.8 | Cross-Site Request Forgery ≤1.5.7Update to 1.5.8 | CVE-2022-33201 |
- Medium4.3Missing Authorization to Authenticated (Contributor+) Form Creation and Deletion
≤1.7.21Update to 1.7.22
- Medium5.5Authenticated (Administrator+) Stored Cross-Site Scripting
≤1.7.16Update to 1.7.17
- Medium6.41.7.6 - Authenticated (Contributor+) Stored Cross-Site Scripting
1.5.0 – 1.7.6Update to 1.7.7
- Medium5.3Missing Authorization
≤1.7.6Update to 1.7.7
- High8.8Cross-Site Request Forgery
≤1.5.7Update to 1.5.8
Same weakness (Missing Authorization)
All Missing Authorization| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity medium, CVSS 4.3
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.