CVE-2021-42358: The Contact Form With Captcha WordPress plugin is vulnerable to Cross-Site Request Forgery due to missing nonc

Q: How do I fix CVE-2021-42358?

contact form with captcha: upgrade to newer than 1.6.2. Exact commands for each OS are on this page.

Q: Is CVE-2021-42358 being exploited?

CVE-2021-42358 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-42358 affect?

CVE-2021-42358 affects contact form with captcha. Severity is high (CVSS 8.8). 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

This month

HIGH 8.8UPGRADE

CVE-2021-42358 is a high-severity flaw (CVSS 8.8) affecting contact form with captcha. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-352
Published	2021-11-29
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: contact form with captcha project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-11-29 19:15 UTCPublished CVE record published
2026-06-17 04:09 UTCUpdated Record last modified

contact form with captcha project contact form with captcha UPGRADE

Affected: <= 1.6.2

Fixed in: newer than 1.6.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy contact-form-with-captcha || rpm -q contact-form-with-captcha || contact-form-with-captcha --version

2. UPGRADE to newer than 1.6.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade contact-form-with-captcha

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade contact-form-with-captcha

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-42358?

contact form with captcha: upgrade to newer than 1.6.2. Exact commands for each OS are on this page.

Is CVE-2021-42358 being exploited?

CVE-2021-42358 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-42358 affect?

CVE-2021-42358 affects contact form with captcha. Severity is high (CVSS 8.8). 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

How urgent is CVE-2021-42358?

Priority 43/100. High severity

Software pages

WordPress vulnerabilities · PHP vulnerabilities

References

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