What’s Vulnerable › Vulnerabilities

CVE-2021-36910: WordPress WP-Appbox plugin <= 4.3.20 - Authenticated Stored Cross-Site Scripting (XSS) vulnerability

• Severity: medium (CVSS 4.8 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: none known
• Published: 2022-04-11 · updated 2026-06-17
• Weakness: CWE-79

Description

Authenticated (admin user role) Stored Cross-Site Scripting (XSS) in WP-Appbox (WordPress plugin) <= 4.3.20.

Affected products

• Marcel Schmilgeit WP-Appbox (WordPress plugin): through 4.3.20

References

• https://patchstack.com/database/vulnerability/wp-appbox/wordpress-wp-appbox-plugin-4-3-20-authenticated-stored-cross-site-scripting-xss-vulnerability
• https://wordpress.org/plugins/wp-appbox/#developers
• https://patchstack.com/database/vulnerability/wp-appbox/wordpress-wp-appbox-plugin-4-3-20-authenticated-stored-cross-site-scripting-xss-vulnerability
• https://wordpress.org/plugins/wp-appbox/#developers

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