CVE-2021-24381

MEDIUM 4.8CVE-2021-24381 · Published 25/10/2021 · updated 17/06/2026

In short

CVE-2021-24381 is a MEDIUM (CVSS 4.8) vulnerability affecting contact form (ninjaforms).
Chance of exploitation in the next 30 days (EPSS): 0.62%, higher than 49.6% of all vulnerabilities.
Fix: update to 3.5.8.2 or later.

Package	Affected versions	Patched versions
contact form ninjaforms	`< 3.5.8.2`	`3.5.8.2`

Description

The Ninja Forms Contact Form WordPress plugin before 3.5.8.2 does not sanitise and escape the custom class name of the form field created, which could allow high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.

References

wpscan.com/vulnerability/e383fae6-e0da-4aba-bb62-adf51c01bf8d · Exploit

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