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Dreammail 5 mail client XSS Vulnerability



Title: Dreammail 5 mail client XSS Vulnerability
Software : Dreammail 

Software Version : v5.16

Vendor: www.dreammail.org

Vulnerability Published : 2016-03-21

Author:zhenwei_qi 
Email:wwiinngd@xxxxxxxxx
Impact : Medium(CVSS2 Base : 4.3, AV:N/AC:M/Au:N/C:N/I:P/A:N)

Bug Description :
DreamMail is an email client application, which allows its users to send, receive, and 

manage emails.
Dreammail (ver 5.16) may be compromised by cross-site scripting attacks. Once attackers 

send emails attaching specific JavaScript codes, the victims who receive those emails may 

lose personal credentials, or the browsers of the victims may be hijacked. 

PoC:
#The email becomes a malicious email when containing the code below.
<img src=x onerror=alert(/xss/) />

Solution :
Using such encode functions as htmlencode() or filtering those certain symbols regarding 

JavaScript as well as Html.