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

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2023-40203
StatePUBLISHED
AssignerPatchstack
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-12-13 15:15:21 UTC
Updated2026-04-28 19:21:08 UTC
DescriptionMissing 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS: 0.003550000 probability, percentile 0.580640000 (date 2026-05-30)

Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
3.1CNACVSS4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Mailmunch Mailchimp Forms All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA MailMunch MailChimp Forms By MailMunch affected n/a 3.1.4 custom Not specified

References

ReferenceSourceLinkTags
patchstack.com/database/wordpress/plugin/mailchimp-forms-by-mailmunch/vulner... [email protected] patchstack.com Third Party Advisory
https://patchstack.com/database/wordpress/plugin/mailchimp-forms-by-mailmunch/vulnerability/wordpress-mailchimp-forms-by-mailmunch-plugin-3-1-4-broken-access-control?_s_id=cve MITRE patchstack.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: István Márton (Patchstack Alliance) (en)

Additional Advisory Data

Solutions

CNA: No patched version is available.

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