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.
Metrics
Affected Vendors & Products
References
History
Tue, 21 Oct 2025 09:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mailgen
Mailgen mailgen |
|
| Vendors & Products |
Mailgen
Mailgen mailgen |
Wed, 15 Oct 2025 18:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Wed, 15 Oct 2025 17:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Mailgen has HTML Injection and XSS Filter Bypass in Plaintext Emails | |
| Weaknesses | CWE-79 | |
| References |
| |
| Metrics |
cvssV4_0
|
Status: PUBLISHED
Assigner: GitHub_M
Published: 2025-10-15T16:52:39.407Z
Updated: 2025-10-15T17:15:16.972Z
Reserved: 2025-10-10T14:22:48.205Z
Link: CVE-2025-62380
Updated: 2025-10-15T17:15:01.847Z
Status : Awaiting Analysis
Published: 2025-10-15T17:16:00.480
Modified: 2025-10-16T15:28:59.610
Link: CVE-2025-62380
No data.