CVE-2026-3253 Missing authorization in MailerLite – Signup forms (official)
Authenticated contributors can create or delete arbitrary signup forms due to missing capability checks in the MailerLite WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3253?
CVE-2026-3253 is a medium-severity missing authorization vulnerability in MailerLite – Signup forms (official), published on 24 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The MailerLite – Signup forms (official) plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the forms() method of the AdminController class in all versions up to, and including, 1.7.21. This makes it possible for authenticated attackers, with Contributor-level access and above, to create or delete arbitrary signup forms.
Weakness: CWE-862
Which versions are affected by CVE-2026-3253?
How do I fix CVE-2026-3253?
No fix has been published for CVE-2026-3253 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-3253 being exploited?
There is no known exploitation of CVE-2026-3253 in the wild and no public exploit code.
Sources
Also known as GHSA-h68w-8j2h-7hvq.