CVE-2021-24357: FooGallery < 2.0.35 - Authenticated Stored Cross-Site Scripting

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-06-14 · updated 2026-06-17
Weakness: CWE-79

Description

In the Best Image Gallery & Responsive Photo Gallery – FooGallery WordPress plugin before 2.0.35, the Custom CSS field of each gallery is not properly sanitised or validated before being being output in the page where the gallery is embed, leading to a stored Cross-Site Scripting issue.

Affected products

fooplugins Gallery by FooGallery: before 2.0.35 — fixed in 2.0.35

How to fix

Upgrade to a fixed version: fooplugins Gallery by FooGallery 2.0.35. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/950f46ae-4476-4969-863a-0e55752953b3
https://wpscan.com/vulnerability/950f46ae-4476-4969-863a-0e55752953b3

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