CVE-2021-4427: The Vuukle Comments, Reactions, Share Bar, Revenue plugin for WordPress is vulnerable to Cross-Site Request Fo

Q: How do I fix CVE-2021-4427?

vuukle comments\, reactions\, share bar\, revenue: upgrade to newer than 3.4.31. Exact commands for each OS are on this page.

Q: Is CVE-2021-4427 being exploited?

CVE-2021-4427 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-2021-4427 affect?

CVE-2021-4427 affects vuukle comments\, reactions\, share bar\, revenue. Severity is medium (CVSS 4.3). The Vuukle Comments, Reactions, Share Bar, Revenue plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 3.4.31. This is due to missing or incorrect nonce validation in the /admin/partials/free-c

Q: How urgent is CVE-2021-4427?

Priority 32/100. Public exploit reference

Routine

MEDIUM 4.3UPGRADE

CVE-2021-4427 is a medium-severity flaw (CVSS 4.3) affecting vuukle comments\, reactions\, share bar\, revenue. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Vuukle Comments, Reactions, Share Bar, Revenue plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 3.4.31. This is due to missing or incorrect nonce validation in the /admin/partials/free-comments-for-wordpress-vuukle-admin-display.php file. This makes it possible for unauthenticated attackers to edit the plugins settings via a forged request granted they can trick a site administrator into perfo

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-352
Published	2023-07-12
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: vuukle

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

Am I affected?

Timeline

2023-07-12 08:15 UTCPublished CVE record published
2026-06-17 04:19 UTCUpdated Record last modified

vuukle vuukle comments\, reactions\, share bar\, revenue UPGRADE

Affected: <= 3.4.31

Fixed in: newer than 3.4.31

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy vuukle-comments-reactions-share-bar-revenue || rpm -q vuukle-comments-reactions-share-bar-revenue || vuukle-comments-reactions-share-bar-revenue --version

2. UPGRADE to newer than 3.4.31 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade vuukle-comments-reactions-share-bar-revenue

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade vuukle-comments-reactions-share-bar-revenue

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-2021-4427?

vuukle comments\, reactions\, share bar\, revenue: upgrade to newer than 3.4.31. Exact commands for each OS are on this page.

Is CVE-2021-4427 being exploited?

CVE-2021-4427 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-2021-4427 affect?

CVE-2021-4427 affects vuukle comments\, reactions\, share bar\, revenue. Severity is medium (CVSS 4.3). The Vuukle Comments, Reactions, Share Bar, Revenue plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 3.4.31. This is due to missing or incorrect nonce validation in the /admin/partials/free-c

How urgent is CVE-2021-4427?

Priority 32/100. Public exploit reference

Software pages

WordPress vulnerabilities · PHP vulnerabilities

References

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