Known vulnerabilities in Swift SMTP (formerly Welcome Email Editor)

Swift SMTP is a free & simple SMTP Plugin for WordPress.

2Reported vulnerabilities

5.3Highest CVSS score

6.3Latest version

7,000+Active installs

What to do now

Update Swift SMTP (formerly Welcome Email Editor) to 5.0.7 or later. 2 of these have a fixed version available. Updating resolves them.

Plugin last updated: December 1, 2025 / Tested up to WordPress: 6.9.7 / 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-2023-47756	Medium 5.3	0.3%	5.0.5 and earlier	`5.0.6`	November 13, 2023
WF-1b9ed184-814d-46cb-979c-908bc9359fae	Medium 4.3	—	5.0.6 and earlier	`5.0.7`	January 8, 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.