CVE-2021-42358

Name: CVE-2021-42358
Creator: NVD / NIST
Published: 2021-11-29T19:15:07.687+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.60%

Last modified Jun 17, 2026

CVE-2021-42358 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. The Contact Form With Captcha WordPress plugin is vulnerable to Cross-Site Request Forgery due to missing nonce validation in the ~/cfwc-form.php file during contact form submission, which made it possible for attackers to inject arbitrary web scripts in versions up to, and including 1.6.2.. EPSS estimates a 0.60% chance of exploitation in the next 30 days.

Description

The Contact Form With Captcha WordPress plugin is vulnerable to Cross-Site Request Forgery due to missing nonce validation in the ~/cfwc-form.php file during contact form submission, which made it possible for attackers to inject arbitrary web scripts in versions up to, and including 1.6.2.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.60%

44.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-352

Affected Software

Vendor	Product	Versions
Contact Form With Captcha Project	Contact Form With Captcha	<= 1.6.2

References

https://plugins.trac.wordpress.org/browser/contact-form-with-captcha/trunk/cfwc-form.php#L17Third Party Advisory
https://wordfence.com/vulnerability-advisories/#CVE-2021-42358Third Party Advisory
https://plugins.trac.wordpress.org/browser/contact-form-with-captcha/trunk/cfwc-form.php#L17Third Party Advisory
https://wordfence.com/vulnerability-advisories/#CVE-2021-42358Third Party Advisory

Timeline

Published: Nov 29, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42358?

How severe is CVE-2021-42358?

CVE-2021-42358 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.60% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42358?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-42358?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST