CVE Catalog

CVE-2025-62380

LowCVSS 2.9
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.45%

37th percentile - higher than 37% of all known CVEs

Summary

Mailgen (Node.js package) through version 2.0.31 contains an HTML injection vulnerability in plaintext emails generated with the generatePlaintext method when user generated content is supplied. Tags with certain Unicode line separator characters are not removed, allowing unexpected HTML to remain in output.

Risk Assessment

If the output is rendered in an HTML context, an attacker could execute script in the victim's browser, leading to data theft or session hijacking.

Recommendation

Update the mailgen package to version 2.0.32 or later, which fixes the issue.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS