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Vulnerabilities

Vulnerability · CVE-2021-34648

ninjaforms ninja_forms Incorrect Authorization

Published Sep 22, 2021 · catalog updated Sep 22, 2021 · ninjaforms ninja_forms Incorrect Authorization

Patch now

CVE-2021-34648 is in the CISA known-exploited catalog. Confirm ninjaforms ninja_forms Incorrect Authorization against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (ninjaforms ninja_forms Incorrect Authorization).
Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
0.66%
Remediation
Remediation guidance
Affected products
stated ninja_forms · vendor ninjaforms ninja_forms

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated ninja_forms<= 3.5.7
  • vendor ninjaforms ninja_formsversion unspecified

How to fix CVE-2021-34648

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2021-34648 is in the CISA known-exploited catalog. Confirm ninjaforms ninja_forms Incorrect Authorization against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with <= 3.5.7. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 0.66%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 22, 2021 · VulnCheck KEV

    Detected

    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.

  2. Sep 22, 2021 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2021-34648

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-34648

    30-day exploitation probability 0.7%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-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 3.5.7. This allows authenticated attackers to send arbitrary emails from the affect

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.