Vulnerability Description
mailgen is a Node.js package that generates responsive HTML e-mails for sending transactional mail. Mailgen versions through 2.0.31 contain an HTML injection vulnerability in plaintext emails generated with the generatePlaintext method when user generated content is supplied. The plaintext generation code attempts to strip HTML tags using a regular expression and then decodes HTML entities, but tags that include certain Unicode line separator characters are not matched and removed. These encoded tags are later decoded into valid HTML content, allowing unexpected HTML to remain in output intended to be plaintext. Projects are affected if they call Mailgen.generatePlaintext with untrusted input and then render or otherwise process the returned string in a context where HTML is interpreted. This can lead to execution of attacker supplied script in the victim’s browser. Version 2.0.32 fixes the issue.
Related Weaknesses (CWE)
References
- https://github.com/eladnava/mailgen/commit/7a791a424ff3a3f7783f8750919f1e9863992
- https://github.com/eladnava/mailgen/security/advisories/GHSA-q4w9-x3rv-4c8j
FAQ
What is CVE-2025-62380?
CVE-2025-62380 is a documented vulnerability. mailgen is a Node.js package that generates responsive HTML e-mails for sending transactional mail. Mailgen versions through 2.0.31 contain an HTML injection vulnerability in plaintext emails generate...
How severe is CVE-2025-62380?
CVSS scoring is not yet available for CVE-2025-62380. Check NVD for updates.
Is there a patch for CVE-2025-62380?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.