The MC4WP: Mailchimp for WordPress plugin before 4.15.0 does not validate that the Mailchimp audience a sign-up form
Source GCVE Database
Not known to be exploited : upgrade to 4.15.0 when convenient.
Data as of 6 Nov 2026, 07:20 UTC
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
Disclosed: evidence found.
CVE published 6 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| MC4WP: Mailchimp for WordPress | Affected
| Fixed in
|
AI-suggested
Upgrade the MC4WP: Mailchimp for WordPress plugin to version 4.15.0 or later, where this validation issue has been fixed. No other mitigation steps are indicated in the provided data.
Description
The MC4WP: Mailchimp for WordPress plugin versions before 4.15.0 contain a vulnerability where the plugin does not validate that the Mailchimp audience a sign-up form or bundled integration subscribes a visitor to matches the audience configured by the site owner. This flaw allows unauthenticated visitors to subscribe arbitrary email addresses to any audience within the site's connected Mailchimp account.