VULNERABILITY INTELLIGENCE

CVE-2021-34648

CVSS score6.4 MEDIUM

EPSS probability0.66%

CISA KEVNot currently listed

Published2021-09-22

Last modified2026-06-17

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

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.

Weakness classification

security@wordfence.com: CWE-863
nvd@nist.gov: CWE-862

Primary references

security@wordfence.com — Patch, Third Party Advisory
security@wordfence.com — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory