CVE-2021-34648 Ninja Forms <= 3.5.7 Unprotected REST-API to Email Injection
Authenticated attackers can send arbitrary emails via an unprotected REST API endpoint, enabling social engineering attacks against victims.
- 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-2021-34648?
CVE-2021-34648 is a medium-severity missing authorization vulnerability in Ninjaforms Ninja Forms, published on 22 Sep 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Ninja Forms WordPress plugin is vulnerable to arbitrary email sending via the trigger_email_action function found in the ~/includes/Routes/Submissions.php file, in versions up to and including 3.5.7. This allows authenticated attackers to send arbitrary emails from the affected server via the /ninja-forms-submissions/email-action REST API which can be used to socially engineer victims.
Which versions are affected by CVE-2021-34648?
It affects 1 product.
Products include Ninjaforms Ninja Forms.
How do I fix CVE-2021-34648?
No fix has been published for CVE-2021-34648 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-2021-34648 being exploited?
There is no known exploitation of CVE-2021-34648 in the wild and no public exploit code.
Other vulnerabilities in Ninjaforms Ninja Forms
- CVE-2025-9083 Ninja-forms < 3.11.1 - Unauthenticated PHP Objection
- CVE-2016-1209 Deserialization in n/a
- CVE-2018-20981 Information disclosure in n/a
- CVE-2024-25572 Cross-site request forgery in Ninja Forms
- CVE-2021-24163 Ninja Forms < 3.4.34 - Authenticated SendWP Plugin Installation and Client Secret Key Disclosure
Sources
Also known as GHSA-6gw3-344q-7p6r.