Known vulnerabilities in Mailster WordPress Newsletter Plugin

Send beautiful newsletters from WordPress. Collect subscribers with signup forms, automate your emails for WooCommerce, blog post notifications & …

6Reported vulnerabilities

9.8Highest CVSS score

2.0.2Latest version

7,000+Active installs

What to do now

Update Mailster WordPress Newsletter Plugin to 4.1.18 or later. 6 of these have a fixed version available. Updating resolves them.

Plugin last updated: June 28, 2024 / Tested up to WordPress: 6.5.10 / View on wordpress.org

This plugin has not been updated in over two years. New vulnerabilities may never be fixed. Consider an alternative.

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-2024-32523	Critical 9.8	1.8%	4.0.6 and earlier	`4.0.7`	April 15, 2024
CVE-2026-27064	High 7.2	0.5%	4.1.17 and earlier	`4.1.18`	July 22, 2026
WF-f3584b5b-ff93-4a47-b6e6-f95335ee88b6	High 7.2	—	2.4.5.1 and earlier	`2.4.9`	October 14, 2020
CVE-2025-64203	Medium 6.1	0.2%	Before 4.1.14	`4.1.14`	October 27, 2025
CVE-2024-37433	Medium 6.1	0.3%	4.0.9 and earlier	`4.0.10`	June 28, 2024
CVE-2024-30503	Medium 6.1	0.4%	1.0.3 and earlier	`2.0.0`	March 28, 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.