CVE-2021-24563

Name: CVE-2021-24563
Creator: NVD / NIST
Published: 2021-10-11T11:15:08.747+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 26.38%

Last modified Jun 17, 2026

CVE-2021-24563 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. The Frontend Uploader WordPress plugin through 1.3.2 does not prevent HTML files from being uploaded via its form, allowing unauthenticated user to upload a malicious HTML file containing JavaScript for example, which will be triggered when someone access the file directly. EPSS estimates a 26.38% chance of exploitation in the next 30 days.

Description

The Frontend Uploader WordPress plugin through 1.3.2 does not prevent HTML files from being uploaded via its form, allowing unauthenticated user to upload a malicious HTML file containing JavaScript for example, which will be triggered when someone access the file directly

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

26.38%

97.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Frontend Uploader Project	Frontend Uploader	<= 1.3.2

References

http://packetstormsecurity.com/files/165515/WordPress-Frontend-Uploader-1.3.2-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
https://wpscan.com/vulnerability/e53ef41e-a176-4d00-916a-3a03835370f1Exploit, Third Party Advisory
http://packetstormsecurity.com/files/165515/WordPress-Frontend-Uploader-1.3.2-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
https://wpscan.com/vulnerability/e53ef41e-a176-4d00-916a-3a03835370f1Exploit, Third Party Advisory

Timeline

Published: Oct 11, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24563?

How severe is CVE-2021-24563?

CVE-2021-24563 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 26.38% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24563?

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-2021-24563?

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

Scan your code now

Source: NVD / NIST