CVE-2024-6520

Name: CVE-2024-6520
Creator: NVD / NIST
Published: 2024-07-27T12:15:11.03+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.4/10EPSS 0.30%

Last modified Jun 17, 2026

CVE-2024-6520 is a medium-severity vulnerability rated 4.4/10 on the CVSS scale. The Contact Form Plugin by Fluent Forms for Quiz, Survey, and Drag & Drop WP Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via custom error message in all versions up to, and including, 5.1.19 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. EPSS estimates a 0.30% chance of exploitation in the next 30 days.

Description

The Contact Form Plugin by Fluent Forms for Quiz, Survey, and Drag & Drop WP Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via custom error message in all versions up to, and including, 5.1.19 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Metrics

CVSS 3.1

4.4/10

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

EPSS Probability

0.30%

21.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Fluentforms	Contact Form	< 5.1.20

References

https://plugins.trac.wordpress.org/changeset/3125227/Patch
https://wordpress.org/plugins/fluentform/#developersRelease Notes
https://www.wordfence.com/threat-intel/vulnerabilities/id/0a30d35c-9883-4b0f-83a2-494401c45d8e?source=cveThird Party Advisory
https://plugins.trac.wordpress.org/changeset/3125227/Patch
https://wordpress.org/plugins/fluentform/#developersRelease Notes
https://www.wordfence.com/threat-intel/vulnerabilities/id/0a30d35c-9883-4b0f-83a2-494401c45d8e?source=cveThird Party Advisory

Timeline

Published: Jul 27, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-6520?

How severe is CVE-2024-6520?

CVE-2024-6520 has a CVSS score of 4.4/10 (MEDIUM severity). The EPSS model estimates a 0.30% probability of exploitation in the next 30 days.

How do I fix CVE-2024-6520?

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-2024-6520?

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

Scan your code now

Source: NVD / NIST