CVE-2026-39713 mailercloud CVE debrief

Who should care

Users of the mailercloud Mailercloud – Integrate webforms and synchronize website contacts plugin should be aware of this vulnerability and take necessary actions to protect their installations. This includes verifying plugin versions, applying patches or updates, and monitoring for suspicious activity.

Technical summary

The CVE-2026-39713 vulnerability has a CVSS score of 5.3 and a severity of MEDIUM. It was published on 2026-04-08T09:16:44.267Z and last modified on 2026-07-24T20:10:00.147Z. The vulnerability is caused by a Missing Authorization issue in the mailercloud Mailercloud – Integrate webforms and synchronize website contacts plugin, which allows for Exploiting Incorrectly Configured Access Control Security Levels. The issue affects versions from n/a through <= 1.0.7.

Defensive priority

MEDIUM

Recommended defensive actions

• Inventory and verify the mailercloud Mailercloud – Integrate webforms and synchronize website contacts plugin version
• Apply the necessary patches or updates to fix the vulnerability
• Monitor for any suspicious activity related to the plugin
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-04-08T09:16:44.267Z and was last modified on 2026-07-24T20:10:00.147Z. The NVD entry is currently Deferred. The vulnerability affects versions from n/a through <= 1.0.7 of the mailercloud Mailercloud – Integrate webforms and synchronize website contacts plugin. Evidence is limited to public CVE and NVD information.

Official resources