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VulnerabilityPublished

CVE-2026-118167: MC4WP: Mailchimp for WordPress · Incorrect Authorization

Affects MC4WP: Mailchimp for WordPressSource CVE Database V5

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Not known to be exploited : upgrade to 4.15.0 when convenient.

Data as of 6 Nov 2026, 06:32 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in 4.15.0

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Upgrade MC4WP: Mailchimp for WordPress to 4.15.0.

Affected software

ProductAffectedFixed in
MC4WP: Mailchimp for WordPressAffected
  • <4.15.0
Fixed in
  • 4.15.0

AI-suggested

Upgrade the MC4WP: Mailchimp for WordPress plugin to version 4.15.0 or later, where this authorization flaw has been fixed.

Description

MC4WP: Mailchimp for WordPress plugin versions before 4.15.0 contain an authorization flaw that allows unauthenticated visitors to subscribe arbitrary email addresses to any Mailchimp audience configured in the site owner's account. This occurs because the plugin does not validate that the audience targeted by a sign-up form or integration matches the audience configured by the site owner.

References

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