CVE-2021-24667

Name: CVE-2021-24667
Creator: NVD / NIST
Published: 2021-08-30T15:15:07.847+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.62%

Last modified Jun 17, 2026

CVE-2021-24667 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. A stored cross-site scripting vulnerability has been discovered in : Simply Gallery Blocks with Lightbox (Version – 2.2.0 & below). The vulnerability exists in the Lightbox functionality where a user with low privileges is allowed to execute arbitrary script code within the context of the application. EPSS estimates a 0.62% chance of exploitation in the next 30 days.

Description

A stored cross-site scripting vulnerability has been discovered in : Simply Gallery Blocks with Lightbox (Version – 2.2.0 & below). The vulnerability exists in the Lightbox functionality where a user with low privileges is allowed to execute arbitrary script code within the context of the application. This vulnerability is due to insufficient validation of image parameters in meta data.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.62%

45.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Simplygallery	Simply Gallery Blocks With Lightbox	< 2.2.1

References

https://wpscan.com/vulnerability/5925b263-6d6f-4a03-a98a-620150dff8f7Third Party Advisory
https://www.fortiguard.com/zeroday/FG-VD-21-060Third Party Advisory
https://wpscan.com/vulnerability/5925b263-6d6f-4a03-a98a-620150dff8f7Third Party Advisory
https://www.fortiguard.com/zeroday/FG-VD-21-060Third Party Advisory

Timeline

Published: Aug 30, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24667?

How severe is CVE-2021-24667?

CVE-2021-24667 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.62% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24667?

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-2021-24667?

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

Scan your code now

Source: NVD / NIST