CVE-2021-24381: 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

medium Affects contact-form (WordPress plugin). Feed 2026.10.29.1, updated 2026-10-28; published 2021-10-25; advisory modified 2026-06-17.

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

Package: contact-form (WordPress plugin) WordPress
Affected versions: <3.5.8.2
Fixed in: 3.5.8.2
Severity: medium CVSS 4.8
Exploitation: not on CISA KEV · EPSS 1% (49.4th percentile)
Published: 2021-10-25
Source: nvd

References

CWE-79

NVD record contact-form (WordPress plugin) advisories

Am I affected?

Find out in one command. phpwarden checks your WordPress install against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden wordpress /var/www/html

Or keep it checked automatically with the GitHub Action or a nightly cron; see WordPress docs.

Install docs How findings are ranked

Related advisories

CVE-2021-24276 medium The Contact Form by Supsystic WordPress plugin before 1.7.15 did not sanitise the tab para same package: contact-form (WordPress plugin)
CVE-2022-3463 critical The Contact Form Plugin WordPress plugin before 4.3.13 does not validate and escape fields same package: contact-form (WordPress plugin)
CVE-2021-24689 medium The Contact Forms - Drag & Drop Contact Form Builder WordPress plugin through 1.0.5 allows same package: contact-form (WordPress plugin)
CVE-2021-24777 high The view submission functionality in the Hotscot Contact Form WordPress plugin before 1.3 same package: contact-form (WordPress plugin)
CVE-2023-24410 medium Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulne same package: contact-form (WordPress plugin)
CVE-2019-25145 high The Contact Form & SMTP Plugin by PirateForms plugin for WordPress is vulnerable to HTML i same package: contact-form (WordPress plugin)