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Mailmunch Forms for Mailchimp vulnerabilities
Mailmunch Forms for Mailchimp has 1 known vulnerability in this database. The most recent published record is dated 5 Aug 2026.
- Known vulnerabilities
- 1
- Active installs
- 10,000+
- Latest version
- 3.2.9
- Last updated
- 6 Jul 2026
- Most recent
- 5 Aug 2026
Find it in your WordPress dashboard under Plugins. Severity is based on the CVSS score published with the CVE where one is available.
| Vulnerability | Severity | Affected | Fix | Published |
|---|---|---|---|---|
| Broken access control CVE-2026-7520 | High 8.1 | Up to 3.2.7 | Fixed in a later version (latest 3.2.9) | 5 Aug 2026 |
Read the published descriptions
- CVE-2026-7520, 5 Aug 2026
- The MailChimp Forms by MailMunch plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `sign_in()` and `sign_up()` AJAX handlers in all versions up to, and including, 3.2.7. This makes it possible for authenticated attackers, with Subscriber-level access and above, to relink the site's MailMunch integration to an attacker-controlled MailMunch account by submitting attacker-supplied credentials. Once relinked, all subscriber data captured by the plugin's forms is delivered to the attacker, and the forms/landing pages rendered on the site are pulled from the attacker's MailMunch account. CVE record
What to do if you run Mailmunch Forms for Mailchimp
If you run Mailmunch Forms for Mailchimp, open WordPress and check the installed version in Plugins. Compare it with the affected versions in the vulnerability record. If a fixed version is available, take a current backup and update to that version or the latest supported release.
If no fixed version exists, consider disabling and removing the plugin or replacing it with a maintained alternative. After dealing with the affected software, check administrator users, unexpected file changes, redirects, unfamiliar pages and security logs for signs that the site may already have been altered.
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