CVE-2021-24926: The Domain Check WordPress plugin before 1.0.17 does not sanitise and escape the domain parameter before outpu

Q: How do I fix CVE-2021-24926?

domain check: upgrade to 1.0.17. Exact commands for each OS are on this page.

Q: Is CVE-2021-24926 being exploited?

CVE-2021-24926 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-2021-24926 affect?

CVE-2021-24926 affects domain check. Severity is medium (CVSS 6.1). The Domain Check WordPress plugin before 1.0.17 does not sanitise and escape the domain parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting issue

Q: How urgent is CVE-2021-24926?

Priority 50/100. EPSS top 4%: very likely to be exploited; Public exploit reference

This week

MEDIUM 6.1UPGRADE

CVE-2021-24926 is a medium-severity flaw (CVSS 6.1) affecting domain check. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Domain Check WordPress plugin before 1.0.17 does not sanitise and escape the domain parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting issue

Why this priority

EPSS top 4%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	12.9% (top 4%)
CISA exploited list	No
Weakness	CWE-79
Published	2022-02-01
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: domaincheckplugin

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

Am I affected?

Timeline

2022-02-01 13:15 UTCPublished CVE record published
2026-06-17 03:41 UTCUpdated Record last modified

domaincheckplugin domain check UPGRADE

Affected: < 1.0.17

Fixed in: 1.0.17

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy domain-check || rpm -q domain-check || domain-check --version

2. UPGRADE to 1.0.17 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade domain-check

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade domain-check

Note

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

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: WordPress Plugin Domain Check 1.0.16 - Reflected Cross-Site Scripting (XSS) (Authenticated)
Nuclei scan template: WordPress Domain Check <1.0.17 - Cross-Site Scripting

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-2021-24926?

domain check: upgrade to 1.0.17. Exact commands for each OS are on this page.

Is CVE-2021-24926 being exploited?

CVE-2021-24926 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-2021-24926 affect?

CVE-2021-24926 affects domain check. Severity is medium (CVSS 6.1). The Domain Check WordPress plugin before 1.0.17 does not sanitise and escape the domain parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting issue

How urgent is CVE-2021-24926?

Priority 50/100. EPSS top 4%: very likely to be exploited; Public exploit reference

Software pages

WordPress vulnerabilities

References

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