CVE-2021-24366: The Admin Columns WordPress plugin before 4.3 and Admin Columns Pro WordPress plugin before 5.5.1 do not sanit

Q: How do I fix CVE-2021-24366?

admin columns: upgrade to 4.3, 5.5.1. Exact commands for each OS are on this page.

Q: Is CVE-2021-24366 being exploited?

CVE-2021-24366 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-24366 affect?

CVE-2021-24366 affects admin columns. Severity is medium (CVSS 5.4). 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 att

Q: How urgent is CVE-2021-24366?

Priority 40/100. Public exploit reference

This month

MEDIUM 5.4UPGRADE

CVE-2021-24366 is a medium-severity flaw (CVSS 5.4) affecting admin columns. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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)

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Published	2021-06-21
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: admincolumns

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-06-21 20:15 UTCPublished CVE record published
2026-06-17 03:39 UTCUpdated Record last modified

admincolumns admin columns UPGRADE

Affected: < 4.3 · < 5.5.1

Fixed in: 4.3, 5.5.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy admin-columns || rpm -q admin-columns || admin-columns --version

2. UPGRADE to 4.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade admin-columns

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade admin-columns

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-24366?

admin columns: upgrade to 4.3, 5.5.1. Exact commands for each OS are on this page.

Is CVE-2021-24366 being exploited?

CVE-2021-24366 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-24366 affect?

CVE-2021-24366 affects admin columns. Severity is medium (CVSS 5.4). 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 att

How urgent is CVE-2021-24366?

Priority 40/100. Public exploit reference

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2021-24365 MEDIUM 5.4 UPGRADE The Admin Columns WordPress plugin Free before 4.3.2 and Pro before 5.5.2 allowed to configure individual colu
CVE-2019-17661 HIGH 8.8 DOWNGRADE A CSV injection in the codepress-admin-columns (aka Admin Columns) plugin 3.4.6 for WordPress allows malicious

References

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