CVE-2021-24495

Name: CVE-2021-24495
Creator: NVD / NIST
Published: 2021-08-09T10:15:07.327+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 2.90%

Last modified Jun 17, 2026

CVE-2021-24495 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. The Marmoset Viewer WordPress plugin before 1.9.3 does not property sanitize, validate or escape the 'id' parameter before outputting back in the page, leading to a reflected Cross-Site Scripting issue.. EPSS estimates a 2.90% chance of exploitation in the next 30 days.

Description

The Marmoset Viewer WordPress plugin before 1.9.3 does not property sanitize, validate or escape the 'id' parameter before outputting back in the page, leading to a reflected Cross-Site Scripting issue.

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

2.90%

85.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Marmoset	Marmoset Viewer	< 1.9.3

References

https://johnjhacking.com/blog/cve-2021-24495-improper-neutralization-of-input-during-web-page-generation-on-id-parameter-in-wordpress-marmoset-viewer-plugin-versions-1.9.3-leads-to-reflected-cross-site-scripting/Exploit, Third Party Advisory
https://wpscan.com/vulnerability/d11b79a3-f762-49ab-b7c8-3174624d7638Exploit, Third Party Advisory
https://johnjhacking.com/blog/cve-2021-24495-improper-neutralization-of-input-during-web-page-generation-on-id-parameter-in-wordpress-marmoset-viewer-plugin-versions-1.9.3-leads-to-reflected-cross-site-scripting/Exploit, Third Party Advisory
https://wpscan.com/vulnerability/d11b79a3-f762-49ab-b7c8-3174624d7638Exploit, Third Party Advisory

Timeline

Published: Aug 9, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24495?

How severe is CVE-2021-24495?

CVE-2021-24495 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 2.90% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24495?

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-2021-24495?

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

Scan your code now

Source: NVD / NIST