8.8

CVE-2021-24163: ninjaforms ninja_forms Missing Authorization

CVSS: 8.8v3.1HighModified
Published 05-04-2021Last modified 03-08-2024

Vulnerability summary

CVE-2021-24163 is a high (CVSS 8.8) Missing Authorization vulnerability in ninjaforms ninja_forms. EPSS estimates a 1.44% chance of exploitation in the next 30 days, higher than 72.8% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
45/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
1.44%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 05-04-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

The AJAX action, wp_ajax_ninja_forms_sendwp_remote_install_handler, did not have a capability check on it, nor did it have any nonce protection, therefore making it possible for low-level users, such as subscribers, to install and activate the SendWP Ninja Forms Contact Form – The Drag and Drop Form Builder for WordPress WordPress plugin before 3.4.34 and retrieve the client_secret key needed to establish the SendWP connection while also installing the SendWP plugin.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.44%

Chance of exploitation in the next 30 days

Percentile

73%

Versus all other CVEs

30-day change

0.00 pp

From 1.44% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.44%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (wpscan.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Ninjaforms1 product
Unknown1 product
Wordpress1 product
  • ninja-forms< 3.4.34

3 vendors · 3 products

References

3 links