Stored cross-site scripting in Mailman - CVE-2020-12137

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to mailman uses the .obj extension for scrubbed application/octet-stream MIME parts. A remote attacker can send a specially crafted attachment to the list, trick the victim to open the email in the list archive and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Remediation

External links

• http://bazaar.launchpad.net/~mailman-coders/mailman/2.1/view/head:/NEWS
• http://www.openwall.com/lists/oss-security/2020/04/24/3
• https://www.openwall.com/lists/oss-security/2020/02/24/2
• https://www.openwall.com/lists/oss-security/2020/02/24/3