How severe is CVE-2021-24357?

CVE-2021-24357 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-24357 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24357?

CVE-2021-24357 affects Fooplugins Foogallery. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24357?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-24357 published?

CVE-2021-24357 was published on 2021-06-14 and last updated on 2026-06-17.

CVE-2021-24357

CVE-2021-24357 is a medium-severity vulnerability in Fooplugins Foogallery with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Fooplugins Foogallery
Published: 2021-06-14
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-24357?: 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.
How severe is CVE-2021-24357?: CVE-2021-24357 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-24357 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24357?: CVE-2021-24357 affects Fooplugins Foogallery. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24357?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-24357 published?: CVE-2021-24357 was published on 2021-06-14 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:fooplugins:foogallery:*:*:*:*:*:wordpress:*:*

More vulnerabilities in Fooplugins Foogallery

CVE-2023-6947 — High (CVSS 7.7): The Best WordPress Gallery Plugin – FooGallery plugin for WordPress is vulnerable to Directory Traversal in all…
CVE-2023-44244 — High (CVSS 7.1): Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in FooPlugins FooGallery plugin <= 2.2.44 versions.
CVE-2023-29439 — High (CVSS 7.1): Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in FooPlugins FooGallery plugin <= 2.2.35 versions.
CVE-2025-6068 — Medium (CVSS 6.4): The FooGallery – Responsive Photo Gallery, Image Viewer, Justified, Masonry & Carousel plugin for WordPress is…
CVE-2024-12119 — Medium (CVSS 6.4): The FooGallery – Responsive Photo Gallery, Image Viewer, Justified, Masonry & Carousel plugin for WordPress is…
CVE-2024-2122 — Medium (CVSS 6.4): The Best WordPress Gallery Plugin – FooGallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via…

All CVEs affecting Fooplugins Foogallery →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →