CVE-2023-40203

FAUCET Score

CVE-2023-40203 is a Missing Authorization vulnerability affecting MailChimp Forms by MailMunch versions up to 3.1.4. This high-severity vulnerability, with a CVSS score of 8.8, allows attackers to exploit incorrectly configured access control, potentially leading to full compromise of confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the potential impact remains significant.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 3.1.5CPE matchmatch criteria	cpe:2.3:a:mailmunch:mailchimp_forms::::::wordpress::*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

Exploitability Score

2.8

Impact Score

1.4

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.57%

Probability of exploitation in next 30 days

EPSS Percentile

43.9%

Percentile rank of EPSS score among Peer Group

As of 2026-07-28

Model: v2026.06.15

This CVE's current EPSS score of 0.0057 is in the 45th percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

patchstack.com / database/wordpress/plugin/mailchimp-forms-by-mailmunch/vulnerability/wordpress-mailchimp-forms-by-mailmunch-plugin-3-1-4-broken-access-control

Third Party Advisory