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Mailman 1.x > 2.1.23 - Cross Site Scripting (XSS)


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# Title: Mailman 1.x > 2.1.23 - Cross Site Scripting (XSS)
# Type:			Reflected XSS
# Software:		Mailman
# Version:		>=1.x <= 2.1.23
# Vendor Homepage:	https://www.list.org
# Original link:	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5950
# POC Author:		Valerio Alessandroni 
# Date: 		28/10/2020
# Description:		Cross-site scripting (XSS) vulnerability in the web UI in Mailman before 2.1.26 allows remote attackers to inject arbitrary web script or HTML via a user-options URL.
# Which [LIST] is a valid list, [EMAIL] is a valid email and [XSS] is the payload
# For this POC I used the following payload
# CVE:  CVE-2018-5950


# Due the payload is loaded inside an HIDDEN INPUT TYPE, until today the only way to trigger the malicious code is via the accesskey attribute.
# An URL Encoded version of the payload is 


# URL Example:

# In order to trigger the alert, the victim has to press the following buttons ALT+SHIFT+X
# where X is an arbitrary button inserted as accesskey attribute in the payload.
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