CVE-2021-25101: The Anti-Malware Security and Brute-Force Firewall WordPress plugin before 4.20.94 does not sanitise and escap

Q: How do I fix CVE-2021-25101?

anti-malware security and brute-force firewall: upgrade to 4.20.94. Exact commands for each OS are on this page.

Q: Is CVE-2021-25101 being exploited?

CVE-2021-25101 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-2021-25101 affect?

CVE-2021-25101 affects anti-malware security and brute-force firewall. Severity is medium (CVSS 4.8). The Anti-Malware Security and Brute-Force Firewall WordPress plugin before 4.20.94 does not sanitise and escape the POST data before outputting it back in attributes of an admin page, leading to a Reflected Cross-Site scripting. Due to the

Q: How urgent is CVE-2021-25101?

Priority 34/100. Public exploit reference

Routine

MEDIUM 4.8UPGRADE

CVE-2021-25101 is a medium-severity flaw (CVSS 4.8) affecting anti-malware security and brute-force firewall. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Anti-Malware Security and Brute-Force Firewall WordPress plugin before 4.20.94 does not sanitise and escape the POST data before outputting it back in attributes of an admin page, leading to a Reflected Cross-Site scripting. Due to the presence of specific parameter value, available to admin users, this can only be exploited by an admin against another admin user.

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 51%)
CISA exploited list	No
Weakness	CWE-79
Published	2022-02-21
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: anti-malware security and brute-force firewall project

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

Am I affected?

Timeline

2022-02-21 11:15 UTCPublished CVE record published
2026-06-17 03:41 UTCUpdated Record last modified

anti-malware security and brute-force firewall project anti-malware security and brute-force firewall UPGRADE

Affected: < 4.20.94

Fixed in: 4.20.94

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy anti-malware-security-and-brute-force-firewall || rpm -q anti-malware-security-and-brute-force-firewall || anti-malware-security-and-brute-force-firewall --version

2. UPGRADE to 4.20.94 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade anti-malware-security-and-brute-force-firewall

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade anti-malware-security-and-brute-force-firewall

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-2021-25101?

anti-malware security and brute-force firewall: upgrade to 4.20.94. Exact commands for each OS are on this page.

Is CVE-2021-25101 being exploited?

CVE-2021-25101 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-2021-25101 affect?

CVE-2021-25101 affects anti-malware security and brute-force firewall. Severity is medium (CVSS 4.8). The Anti-Malware Security and Brute-Force Firewall WordPress plugin before 4.20.94 does not sanitise and escape the POST data before outputting it back in attributes of an admin page, leading to a Reflected Cross-Site scripting. Due to the

How urgent is CVE-2021-25101?

Priority 34/100. Public exploit reference

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2022-2599 MEDIUM 6.1 UPGRADE The Anti-Malware Security and Brute-Force Firewall WordPress plugin before 4.21.83 does not sanitise and escap

References

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