CVE-2021-24574

Name: CVE-2021-24574
Creator: NVD / NIST
Published: 2021-08-23T12:15:10.417+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 0.68%

Last modified Jun 17, 2026

CVE-2021-24574 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. The Simple Banner WordPress plugin before 2.10.4 does not sanitise and escape one of its settings, allowing high privilege users such as admin to use Cross-Site Scripting payload even when the unfiltered_html capability is disallowed.. EPSS estimates a 0.68% chance of exploitation in the next 30 days.

Description

The Simple Banner WordPress plugin before 2.10.4 does not sanitise and escape one of its settings, allowing high privilege users such as admin to use Cross-Site Scripting payload 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

0.68%

47.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Simple Banner Project	Simple Banner	< 2.10.4

References

https://plugins.trac.wordpress.org/changeset/2571047/Patch, Third Party Advisory
https://wpscan.com/vulnerability/9adf7022-5108-43b7-bf0e-a42593185b74Exploit, Third Party Advisory
https://plugins.trac.wordpress.org/changeset/2571047/Patch, Third Party Advisory
https://wpscan.com/vulnerability/9adf7022-5108-43b7-bf0e-a42593185b74Exploit, Third Party Advisory

Timeline

Published: Aug 23, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24574?

How severe is CVE-2021-24574?

CVE-2021-24574 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.68% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24574?

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-2021-24574?

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

Scan your code now

Source: NVD / NIST