CVE-2021-24124

Name: CVE-2021-24124
Creator: NVD / NIST
Published: 2021-03-18T15:15:13.76+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.15%

Last modified Jun 17, 2026

CVE-2021-24124 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Unvalidated input and lack of output encoding in the WP Shieldon WordPress plugin, version 1.6.3 and below, leads to Unauthenticated Reflected Cross-Site Scripting (XSS) when the CAPTCHA page is shown could lead to privileged escalation.. EPSS estimates a 1.15% chance of exploitation in the next 30 days.

Description

Unvalidated input and lack of output encoding in the WP Shieldon WordPress plugin, version 1.6.3 and below, leads to Unauthenticated Reflected Cross-Site Scripting (XSS) when the CAPTCHA page is shown could lead to privileged escalation.

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

1.15%

62.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Terryl	Wp Shieldon	<= 1.6.3

References

https://wpscan.com/vulnerability/8d0eb0b4-0cc0-44e5-b720-90b01df3a6eeExploit, Third Party Advisory
https://wpscan.com/vulnerability/8d0eb0b4-0cc0-44e5-b720-90b01df3a6eeExploit, Third Party Advisory

Timeline

Published: Mar 18, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24124?

How severe is CVE-2021-24124?

CVE-2021-24124 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.15% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24124?

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-2021-24124?

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

Scan your code now

Source: NVD / NIST