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CVE-2021-34648: 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

medium Affects ninja-forms (WordPress plugin). Feed 2026.10.29.4, updated 2026-10-29; published ; advisory modified .

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

Package
ninja-forms (WordPress plugin) WordPress
Affected versions
<=3.5.7
Fixed in
no fix recorded
Severity
medium  CVSS 6.4
Exploitation
not on CISA KEV · EPSS 1% (51.4th percentile)
Published
2021-09-22
Source
nvd

References

CWE-862CWE-863
NVD recordninja-forms (WordPress plugin) advisories

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# then
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