CVE-2021-24608

Name: CVE-2021-24608
Creator: NVD / NIST
Published: 2021-10-25T14:15:10.397+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 0.65%

Last modified Jun 17, 2026

CVE-2021-24608 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. The Formidable Form Builder – Contact Form, Survey & Quiz Forms Plugin for WordPress plugin before 5.0.07 does not sanitise and escape its Form's Labels, allowing high privileged users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed. EPSS estimates a 0.65% chance of exploitation in the next 30 days.

Description

The Formidable Form Builder – Contact Form, Survey & Quiz Forms Plugin for WordPress plugin before 5.0.07 does not sanitise and escape its Form's Labels, allowing high privileged users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed

Metrics

CVSS 3.1

4.8/10

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

EPSS Probability

0.65%

46.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Strategy11	Formidable Form Builder	< 5.0.07

References

https://plugins.trac.wordpress.org/changeset/2609911Patch, Third Party Advisory
https://wpscan.com/vulnerability/75305ea8-730b-4caf-a3c6-cb94adee683cExploit, Third Party Advisory
https://plugins.trac.wordpress.org/changeset/2609911Patch, Third Party Advisory
https://wpscan.com/vulnerability/75305ea8-730b-4caf-a3c6-cb94adee683cExploit, Third Party Advisory

Timeline

Published: Oct 25, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24608?

How severe is CVE-2021-24608?

CVE-2021-24608 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24608?

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-2021-24608?

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

Scan your code now

Source: NVD / NIST