Known vulnerabilities in Message Filter for Contact Form 7

Filter messages submitted through contact form 7 based on words and/or emails listed as restricted.

7Reported vulnerabilities

7.2Highest CVSS score

1.6.4.0Latest version

1,000+Active installs

What to do now

Update Message Filter for Contact Form 7 to 1.6.4.0 or later. 7 of these have a fixed version available. Updating resolves them.

Plugin last updated: July 17, 2026 / Tested up to WordPress: 7.0.4 / View on wordpress.org

Reported vulnerabilities

Ordered by how urgently they need attention — whether a vulnerability is actually being exploited, and how likely exploitation is, rather than CVSS severity alone.

CVE	Severity	Exploit probability next 30 days	Affected versions	Fixed in	Published
CVE-2026-65438	High 7.2	0.1%	1.6.3.9 and earlier	`1.6.4.0`	July 27, 2026
CVE-2026-57423	Medium 6.1	0.3%	1.6.3.8 and earlier	`1.6.3.9`	July 8, 2026
CVE-2024-39647	Medium 6.1	0.3%	1.6.1.1 and earlier	`1.6.2`	August 1, 2024
CVE-2025-46252	Medium 4.9	0.4%	1.6.3.2 and earlier	`1.6.33`	April 22, 2025
CVE-2024-12026	Medium 4.3	0.3%	0 to 1.6.3 (inclusive)	`1.6.3.1`	December 7, 2024
CVE-2024-12027	Medium 4.3	0.3%	0 to 1.6.3 (inclusive)	`1.6.3.1`	December 6, 2024
CVE-2024-54254	Medium 4.3	0.4%	1.6.3 and earlier	`1.6.3.1`	December 5, 2024

Sources: vulnerability records from NVD, exploitation from CISA KEV, exploit probability from EPSS. Affected versions come from CPE ranges or from the reporting CNA.