| Package | Affected versions | Patched versions |
|---|---|---|
| mailman | ≥ 2.0, < 2.1.30 | 2.1.30 |
| backports sle | = 15.0 |
GNU Mailman 2.x before 2.1.30 uses the .obj extension for scrubbed application/octet-stream MIME parts. This behavior may contribute to XSS attacks against list-archive visitors, because an HTTP reply from an archive web server may lack a MIME type, and a web browser may perform MIME sniffing, conclude that the MIME type should have been text/html, and execute JavaScript code.
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