Read the docs
TI-2023-21073 Aliases CVE-2023-40203GHSA-476h-737f-mc4w

WordPress MailChimp Forms by MailMunch plugin <= 3.1.4 - Broken Access Control

Priority LOW 39CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-862.

Summary

Missing Authorization vulnerability in MailMunch MailChimp Forms by MailMunch allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects MailChimp Forms by MailMunch: from n/a through 3.1.4.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00706 53rd 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

VendorProductAffected versionsFixed inStatusSource
MailMunchMailChimp Forms by MailMunchup to 3.1.4—No fix listedCNA
  • MailChimp Forms by MailMunch VendorMailMunch Affected up to 3.1.4 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mailmunch:mailchimp_forms:*:*:*:*:*:wordpress:*:*before 3.1.5VulnerableMailMunch
  • cpe:2.3:a:mailmunch:mailchimp_forms:*:*:*:*:*:wordpress:*:* Versions before 3.1.5 Vulnerable ·MailMunch

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-40203
  2. 2026-10-03 Alias added: GHSA-476h-737f-mc4w

References

Advisory 1

  • TI-2023-24522 WordPress MailChimp Forms by MailMunch Plugin <= 3.1.4 is vulnerable to Cross Site Request Forgery (CSRF) CVSS 3.1HIGH 8.8
  • TI-2024-20750 WordPress MailChimp Forms by MailMunch plugin <= 3.2.1 - Cross Site Request Forgery (CSRF) vulnerability CVSS 3.1HIGH 8.8
  • TI-2024-19569 WordPress MailChimp Forms by MailMunch plugin <= 3.2.2 - Cross Site Scripting (XSS) vulnerability CVSS 3.1MEDIUM 6.5
  • TI-2024-08095 MailChimp Forms by MailMunch <= 3.2.3 - Reflected Cross-Site Scripting CVSS 3.1MEDIUM 6.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences