MC4WP: Mailchimp for WordPress <= 4.8.4 — Cross-Site Request Forgery
370a6130-425c-4264-baaf-8989d3b00d14Published · Updated Action summary
Affected: ≤4.8.4Update to 4.8.5 or newer
All remediation steps- Severity
- High8.8
- CVSS
- 8.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:RUser interaction- Required
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Weakness
- CWE-352 CSRF
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
MC4WP: Mailchimp for WordPress mailchimp-for-wp
- Affected≤ 4.8.4
- Patched in4.8.5
Update to 4.8.5 or newer.
You are affected if you run ≤ 4.8.4. Version 4.8.5 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under MC4WP: Mailchimp for WordPress.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 4.8.5, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch MC4WP: Mailchimp for WordPress to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to WPScanTeam.
The MC4WP: Mailchimp for WordPress for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 4.8.4. This is due to missing nonce validation on the 'listen_for_actions' function. This makes it possible for unauthenticated attackers to dismiss notices and delete log files via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
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 MC4WP: Mailchimp for WordPress
All 16| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium5.3 | Missing Authorization ≤4.14.1Update to 4.15.0 | CVE-2026-27356 | |
| Medium6.5 | Unauthenticated Arbitrary Shortcode Execution ≤4.14.0Update to 4.15.0 | CVE-2026-118166 | |
| Medium5.3 | Missing Authorization ≤4.14.0Update to 4.15.0 | CVE-2026-118167 | |
| Medium6.1 | Reflected Cross-Site Scripting via 'data' Dynamic Content Tag ≤4.14.0Update to 4.14.1 | CVE-2026-87917 | |
| Medium6.4 | Authenticated (Author+) Stored Cross-Site Scripting via Form Response Messages ≤4.12.0Update to 4.12.1 | CVE-2026-4561 |
- Medium5.3Missing Authorization
≤4.14.1Update to 4.15.0
- Medium6.5Unauthenticated Arbitrary Shortcode Execution
≤4.14.0Update to 4.15.0
- Medium5.3Missing Authorization
≤4.14.0Update to 4.15.0
- Medium6.1Reflected Cross-Site Scripting via 'data' Dynamic Content Tag
≤4.14.0Update to 4.14.1
- Medium6.4Authenticated (Author+) Stored Cross-Site Scripting via Form Response Messages
≤4.12.0Update to 4.12.1
Same weakness (CSRF)
All CSRF| 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
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- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
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ELEX WordPress HelpDesk & Customer Ticketing System
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- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity high, CVSS 8.8
Record last updated
Sources & licenses
- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- 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.