TI-2021-13662 Aliases CVE-2021-34648 GHSA-6gw3-344q-7p6r

Ninja Forms <= 3.5.7 Unprotected REST-API to Email Injection

LOW 29CWE-863Published 2021-09-22 · Updated 2025-03-31

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-863.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00657 51st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Saturday Drive	Ninja Forms	3.5.7 – 3.5.7	—	No fix listed	CNA

Ninja Forms VendorSaturday Drive Affected 3.5.7 – 3.5.7 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:ninjaforms:ninja_forms::::::wordpress::*	up to 3.5.7	Vulnerable	Saturday Drive

cpe:2.3:a:ninjaforms:ninja_forms:*:*:*:*:*:wordpress:*:* Versions up to 3.5.7 Vulnerable ·Saturday Drive

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-34648
2026-10-03 Alias added: GHSA-6gw3-344q-7p6r
2026-10-11 EPSS moved to the 50th–90th percentile

References

Exploit 1

https://www.wordfence.com/blog/2021/09/recently-patched-vulnerabilities-in-ninja-forms-plugin-affects-over-1-million-site-owners/

Patch 1

https://plugins.trac.wordpress.org/browser/ninja-forms/trunk/includes/Routes/Submissions.php?rev=2543837#L155

TI-2025-08325 Ninja-forms < 3.11.1 - Unauthenticated PHP Objection CVSS 3.1CRITICAL 9.8
TI-2016-01107 The Ninja Forms plugin before 2.9.42.1 for WordPress allows remote attackers to conduct… CVSS 3.0CRITICAL 9.8
TI-2023-19777 WordPress Ninja Forms plugin <= 3.6.25 - Subscriber+ Broken Access Control vulnerability CVSS 3.1HIGH 8.8
TI-2022-02691 NinjaForms < 3.6.13 - Admin+ PHP Objection Injection CVSS 3.1HIGH 7.2
TI-2024-06815 Ninja Forms 3.8.6-3.8.10 - Reflected XSS CVSS 3.1MEDIUM 6.1
TI-2023-01723 Ninja Forms < 3.6.22 - Reflected XSS CVSS 3.1MEDIUM 6.1

See all 56 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences