CVE-2026-7520

8.1 HIGH

Published 2026-08-05 · Updated 2026-08-05

AI risk analysis

Summary: The flaw allows authenticated attackers with Subscriber-level access to modify data by relinking MailMunch integration, leading to unauthorized access to subscriber data.
Exploitability: Exploitation is moderate as it requires an attacker to have Subscriber-level access and submit attacker-supplied credentials via AJAX handlers.
Blast radius: If exploited, the impact could be significant as it grants attackers access to all captured subscriber data and control over forms/landing pages on the site.
Prioritized remediation: Update to the latest version of the MailChimp Forms by MailMunch plugin or apply a capability check patch if available.

auth-bypassdata-exposureweb

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Weaknesses

CWE-862

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.