Read the docs
TI-2026-01018 Aliases CVE-2026-1303GHSA-4p4p-xgjx-qcc9

MailChimp Campaigns <= 3.2.4 - Missing Authorization to Authenticated (Subscriber+) MailChimp App Disconnection

Priority LOW 30CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00337 27th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
matthieuscarsetMailChimp Campaignsup to 3.2.4—No fix listedCNA
  • MailChimp Campaigns Vendormatthieuscarset Affected up to 3.2.4 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-1303
  2. 2026-10-03 Alias added: GHSA-4p4p-xgjx-qcc9

References

Other 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences