CVE-2021-24539: The Coming Soon, Under Construction & Maintenance Mode By Dazzler WordPress plugin before 1.6.7 does not sanit

Q: Is CVE-2021-24539 being exploited?

CVE-2021-24539 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-2021-24539 affect?

CVE-2021-24539 affects coming soon\, under construction \& maintenance mode by dazzler. Severity is medium (CVSS 4.8). The Coming Soon, Under Construction & Maintenance Mode By Dazzler WordPress plugin before 1.6.7 does not sanitise or escape its description setting when outputting it in the frontend when the Coming Soon mode is enabled, even when the unfil

Q: How urgent is CVE-2021-24539?

Priority 34/100. Public exploit reference

Routine

MEDIUM 4.8UPGRADE

CVE-2021-24539 is a medium-severity flaw (CVSS 4.8) affecting coming soon\, under construction \& maintenance mode by dazzler. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Coming Soon, Under Construction & Maintenance Mode By Dazzler WordPress plugin before 1.6.7 does not sanitise or escape its description setting when outputting it in the frontend when the Coming Soon mode is enabled, even when the unfiltered_html capability is disallowed, leading to an authenticated Stored Cross-Site Scripting issue

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-11-01
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: dazzlersoftware

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

Am I affected?

Timeline

2021-11-01 09:15 UTCPublished CVE record published
2026-06-17 03:40 UTCUpdated Record last modified

dazzlersoftware coming soon\, under construction \& maintenance mode by dazzler UPGRADE

Affected: < 1.6.7

Fixed in: 1.6.7

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy coming-soon-under-construction--maintenance-mode-by-dazzler || rpm -q coming-soon-under-construction--maintenance-mode-by-dazzler || coming-soon-under-construction--maintenance-mode-by-dazzler --version

2. UPGRADE to 1.6.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade coming-soon-under-construction--maintenance-mode-by-dazzler

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade coming-soon-under-construction--maintenance-mode-by-dazzler

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-2021-24539?

coming soon\, under construction \& maintenance mode by dazzler: upgrade to 1.6.7. Exact commands for each OS are on this page.

Is CVE-2021-24539 being exploited?

CVE-2021-24539 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-2021-24539 affect?

CVE-2021-24539 affects coming soon\, under construction \& maintenance mode by dazzler. Severity is medium (CVSS 4.8). The Coming Soon, Under Construction & Maintenance Mode By Dazzler WordPress plugin before 1.6.7 does not sanitise or escape its description setting when outputting it in the frontend when the Coming Soon mode is enabled, even when the unfil

How urgent is CVE-2021-24539?

Priority 34/100. Public exploit reference

Software pages

WordPress vulnerabilities

References

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