CVE-2021-24518

Name: CVE-2021-24518
Creator: NVD / NIST
Published: 2021-08-16T11:15:08.593+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 0.69%

Last modified Jun 17, 2026

CVE-2021-24518 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. The WPFront Notification Bar WordPress plugin before 2.0.0.07176 does not sanitise or escape its Custom CSS setting, allowing high privilege users such as admin to set XSS payload in it even when the unfiltered_html capability is disallowed, leading to an authenticated Stored Cross-Site Scripting issue. EPSS estimates a 0.69% chance of exploitation in the next 30 days.

Description

The WPFront Notification Bar WordPress plugin before 2.0.0.07176 does not sanitise or escape its Custom CSS setting, allowing high privilege users such as admin to set XSS payload in it even when the unfiltered_html capability is disallowed, leading to an authenticated Stored Cross-Site Scripting issue

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

0.69%

48.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Wpfront	Notification Bar	< 2.0.0.07176

References

https://packetstormsecurity.com/files/163472/Exploit, Third Party Advisory, VDB Entry
https://wpscan.com/vulnerability/53103cdc-a4bf-40fa-aeb1-790fc7a65f0aExploit, Third Party Advisory
https://packetstormsecurity.com/files/163472/Exploit, Third Party Advisory, VDB Entry
https://wpscan.com/vulnerability/53103cdc-a4bf-40fa-aeb1-790fc7a65f0aExploit, Third Party Advisory

Timeline

Published: Aug 16, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24518?

How severe is CVE-2021-24518?

CVE-2021-24518 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.69% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24518?

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-2021-24518?

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

Scan your code now

Source: NVD / NIST