HTML Injection

mailgen is vulnerable to HTML injection. The vulnerability is due to improper stripping of HTML tags in the generatePlaintext method when Unicode line-separator characters bypass the regex filter, which allows an attacker to inject unexpected HTML that can be interpreted as executable script...

CVE-2025-62380

Mailgen (Node.js) versions up to 2.0.31 expose an HTML injection/XSS risk in plaintext output generated by generatePlaintext. The plaintext cleaning code strips HTML tags with a regex, decodes HTML entities, and then replaces decoded content; however, HTML tags containing certain Unicode line sep...