CVE-2020-12137: XSS
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.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2020-12137?
CVE-2020-12137 is a vulnerability in GNU Mailman 2.x before version 2.1.30 that allows for XSS attacks against list-archive visitors.
How does CVE-2020-12137 affect GNU Mailman?
CVE-2020-12137 affects GNU Mailman 2.x versions before 2.1.30, allowing for potential XSS attacks against list-archive visitors.
What is the severity of CVE-2020-12137?
The severity of CVE-2020-12137 is medium, with a severity value of 6.1.
How can I fix CVE-2020-12137?
To fix CVE-2020-12137, you should update GNU Mailman to version 2.1.30 or later.
Where can I find more information about CVE-2020-12137?
You can find more information about CVE-2020-12137 in the links provided: [http://bazaar.launchpad.net/~mailman-coders/mailman/2.1/view/head:/NEWS](http://bazaar.launchpad.net/~mailman-coders/mailman/2.1/view/head:/NEWS) and [https://www.openwall.com/lists/oss-security/2020/02/24/2](https://www.openwall.com/lists/oss-security/2020/02/24/2).