CVE-2022-4100: The WP Cerber Security plugin for WordPress is vulnerable to IP Protection bypass in versions up to, and inclu

Q: How do I fix CVE-2022-4100?

cerber security antispam \& malware scan: upgrade to 9.5. Exact commands for each OS are on this page.

Q: Is CVE-2022-4100 being exploited?

CVE-2022-4100 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-2022-4100 affect?

CVE-2022-4100 affects cerber security antispam \& malware scan. Severity is medium (CVSS 5.3). The WP Cerber Security plugin for WordPress is vulnerable to IP Protection bypass in versions up to, and including 9.4 due to the plugin improperly checking for a visitor's IP address. This makes it possible for an attacker whose IP address

Q: How urgent is CVE-2022-4100?

Priority 31/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2022-4100 is a medium-severity flaw (CVSS 5.3) affecting cerber security antispam \& malware scan. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The WP Cerber Security plugin for WordPress is vulnerable to IP Protection bypass in versions up to, and including 9.4 due to the plugin improperly checking for a visitor's IP address. This makes it possible for an attacker whose IP address has been blocked to bypass this control by setting the X-Forwarded-For: HTTP header to an IP Address that hasn't been blocked.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Weakness	CWE-693
Published	2024-08-31
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: wpcerber

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

Am I affected?

Timeline

2024-08-31 09:15 UTCPublished CVE record published
2026-06-17 05:19 UTCUpdated Record last modified

wpcerber cerber security antispam \& malware scan UPGRADE

Affected: < 9.5

Fixed in: 9.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cerber-security-antispam--malware-scan || rpm -q cerber-security-antispam--malware-scan || cerber-security-antispam--malware-scan --version

2. UPGRADE to 9.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cerber-security-antispam--malware-scan

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cerber-security-antispam--malware-scan

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-2022-4100?

cerber security antispam \& malware scan: upgrade to 9.5. Exact commands for each OS are on this page.

Is CVE-2022-4100 being exploited?

CVE-2022-4100 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-2022-4100 affect?

CVE-2022-4100 affects cerber security antispam \& malware scan. Severity is medium (CVSS 5.3). The WP Cerber Security plugin for WordPress is vulnerable to IP Protection bypass in versions up to, and including 9.4 due to the plugin improperly checking for a visitor's IP address. This makes it possible for an attacker whose IP address

How urgent is CVE-2022-4100?

Priority 31/100. Remotely exploitable, no login, no user action

Software pages

WordPress vulnerabilities

References

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