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Contact Form 7 Extension For Mailchimp <= 0.5.70 — Authenticated (Subscriber+) Server-Side Request Forgery

CVE-2024-22134Published · Updated

Action summary

Affected: ≤0.5.70Update to 0.9.19 or newer

All remediation steps
Watch plugin
Severity
Medium5.4
CVSS
5.4
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:L Privileges required
Low
UI:N User interaction
None
S:U Scope
Unchanged
C:L Confidentiality
Low
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-918 SSRF
Required access
Unknown
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Connect Contact Form 7 to Mailchimp, Brevo, MailerLite, Klaviyo, GetResponse, EmailOctopus, Campaign Monitor & Moosend contact-form-7-mailchimp-extension

  1. Affected≤ 0.5.70
  2. Patched in0.9.19

Update to 0.9.19 or newer.

You are affected if you run ≤ 0.5.70. Version 0.9.19 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Connect Contact Form 7 to Mailchimp, Brevo, MailerLite, Klaviyo, GetResponse, EmailOctopus, Campaign Monitor & Moosend.
  • No admin access? Run a passive check of your site. It reads public files only.

What to do

  1. Update to version 0.9.19, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Connect Contact Form 7 to Mailchimp, Brevo, MailerLite, Klaviyo, GetResponse, EmailOctopus, Campaign Monitor & Moosend to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Yuchen Ji.

The Contact Form 7 Extension For Mailchimp plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 0.5.70. This makes it possible for authenticated attackers, with subscriber-level access and above, to make web requests to arbitrary locations originating from the web application which can be used to query and modify information from internal services.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Connect Contact Form 7 to Mailchimp, Brevo, MailerLite, Klaviyo, GetResponse, EmailOctopus, Campaign Monitor & Moosend

All 4
More vulnerabilities in Connect Contact Form 7 to Mailchimp, Brevo, MailerLite, Klaviyo, GetResponse, EmailOctopus, Campaign Monitor & Moosend
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Mailchimp Merge Field Values
≤0.9.78.06Update to 0.9.78.07
CVE-2026-15000
Medium4.3Authenticated (Contributor+) Information Exposure
≤0.9.54Update to 0.9.69
CVE-2025-68989
Medium4.3Cross-Site Request Forgery
≤0.5.73Update to 0.9.19
CVE-2024-33677

Same weakness (SSRF)

All SSRF
Other SSRF vulnerabilities
SeverityVulnerabilityCVEPublished
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
CVE-2026-120688
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
CVE-2026-125055
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
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity medium, CVSS 5.4

  2. 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.

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