Known vulnerabilities in MailerLite – Signup forms (official)

Add newsletter signup forms to your WordPress site. Subscribers will be saved directly to your MailerLite account. Super easy to set up!

7Reported vulnerabilities

9.8Highest CVSS score

1.7.26Latest version

100,000+Active installs

What to do now

Update MailerLite – Signup forms (official) to 1.7.19 or later. 7 of these have a fixed version available. Updating resolves them.

Plugin last updated: June 26, 2026 / Tested up to WordPress: 6.8.8 / 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
WF-ec9cd4a8-286e-43d7-8cb6-6cc363800e20	Critical 9.8	—	Before 1.4.4	`1.4.4`	May 22, 2020
CVE-2022-33201	High 8.8	0.4%	Before 1.5.8	`1.5.8`	August 5, 2022
CVE-2024-1386	Medium 6.4	0.4%	1.5.0 to 1.7.6 (inclusive)	`1.7.7`	May 2, 2024
CVE-2025-13993	Medium 5.5	0.3%	0 to 1.7.16 (inclusive)	`1.7.17`	December 12, 2025
CVE-2024-2797	Medium 5.3	0.5%	0 to 1.7.6 (inclusive)	`1.7.7`	May 2, 2024
WF-f3b79fab-208f-4354-89ea-508290dcd851	Medium 5.4	—	Before 1.4.5	`1.4.5`	May 22, 2020
CVE-2026-25420	Medium 4.3	0.2%	1.7.18 and earlier	`1.7.19`	January 28, 2026

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