CVE-2021-24366: Admin Columns Free < 4.3 & Pro < 5.5.1 - Admin+ Stored XSS in Label

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-06-21 · updated 2026-06-17

Description

The Admin Columns WordPress plugin before 4.3 and Admin Columns Pro WordPress plugin before 5.5.1 do not sanitise and escape its Label settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)

Affected products

AdminColumns Admin Columns: before 4.3; before 5.5.1 — fixed in 4.3, 5.5.1

How to fix

Upgrade to a fixed version: AdminColumns Admin Columns 4.3, 5.5.1. Check the vendor advisory for mitigations.

References

https://github.com/codepress/admin-columns/commit/b45571ed21d574d13687213a5002e0c68e4442c7
https://wpscan.com/vulnerability/05427156-4d5c-4aeb-add8-1c574fda5c28
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-24366
https://github.com/codepress/admin-columns/commit/b45571ed21d574d13687213a5002e0c68e4442c7
https://wpscan.com/vulnerability/05427156-4d5c-4aeb-add8-1c574fda5c28
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-24366

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