Defender Security – Malware Scanner, Login Security & Firewall vulnerabilities
Plugin slug defender-security · 8 known vulnerabilities · latest disclosed 2026-08-27 · WordPress.org page
Every listed vulnerability has a fix. Version 6.2.0 or later is not affected by any of them. If your site runs an older version, update it.
2 of 8 rated high or critical (CVSS 7 or more).
Known vulnerabilities in Defender Security – Malware Scanner, Login Security & Firewall
| Severity | Affected versions | Fixed in | CVE | Published | Details |
|---|---|---|---|---|---|
| High 7.2 | < 6.2.0 | 6.2.0 | CVE-2026-19225 | 2026-08-27 | Advisory |
| Medium 5.3 | <= 4.7.2 | 4.7.3 | CVE-2024-37444 | 2024-06-28 | Advisory |
| Medium 6.5 | <= 4.4.1 | 4.4.2 | CVE-2024-25595 | 2024-02-12 | Advisory |
| Medium 5.3 | <= 4.1.0 | 4.2.0 | CVE-2023-51490 | 2023-12-27 | Advisory |
| Medium 5.3 | <= 4.2.0 | 4.2.1 | CVE-2023-47189 | 2023-11-03 | Advisory |
| Medium 5.3 | <= 4.0.2 | 4.1.0 | CVE-2023-5089 | 2023-09-06 | Advisory |
| High 7.5 | <= 3.3.2 | 3.3.3 | CVE-2022-44581 | 2022-11-23 | Advisory |
| Medium 4.3 | <= 2.4.6 | 2.4.6.1 | CVE-2021-4425 | 2021-03-01 | Advisory |
Check if a site is affected
Enter a site address to see which version of Defender Security – Malware Scanner, Login Security & Firewall and other plugins it runs, and whether they match a known vulnerability.
Questions
Is the Defender Security – Malware Scanner, Login Security & Firewall plugin safe to use?
All 8 known issues are fixed in current versions (6.2.0 or later). Keeping it updated is what matters.
How do I check which version of Defender Security – Malware Scanner, Login Security & Firewall my site runs?
In WordPress go to Plugins > Installed Plugins. From the outside, the free PluginPeek scan below reads the version from the site's public files.
How do I fix a vulnerable plugin?
Make a full backup, then update it from Dashboard > Updates and check the site afterwards. If you would rather not, we can do it for a fixed $99, paid after you have checked the site.