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Serendipity 2.0.2 Cross Site Scripting

Serendipity 2.0.2 Cross Site Scripting
Posted Jan 7, 2016
Authored by Onur YILMAZ, Selcuk Miynat | Site netsparker.com

Serendipity version 2.0.2 suffers from a cross site scripting vulnerability.

tags | exploit, xss
advisories | CVE-2015-8603
SHA-256 | e95b30729df1fe5b42e1dc59030dd9a7255c75aedc1da023499c18019c06d66b

Serendipity 2.0.2 Cross Site Scripting

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Information
--------------------
Advisory by Netsparker
Name: XSS Vulnerability in Serendipity
Affected Software : Serendipity
Affected Versions: v2.0.2 and possibly below
Vendor Homepage : http://www.s9y.org
Vulnerability Type : Cross-site Scripting
Severity : Important
Status : Fixed
CVE-ID : CVE-2015-8603
Netsparker Advisory Reference : NS-15-024

Description
--------------------
By exploiting a Cross-site scripting vulnerability the attacker can
hijack a logged in user’s session. This means that the malicious
hacker can change the logged in user’s password and invalidate the
session of the victim while the hacker maintains access. As seen from
the XSS example in this article, if a web application is vulnerable to
cross-site scripting and the administrator’s session is hijacked, the
malicious hacker exploiting the vulnerability will have full admin
privileges on that web application.

Technical Details
--------------------
Proof of Concept URL for XSS in Serendipity v2.0.2:

/serendipity/serendipity_admin.php?serendipity[action]=admin&serendipity[adminModule]=comments&serendipity[adminAction]=edit&serendipity[id]=2&serendipity[entry_id]='"--></style></scRipt><scRipt>alert(0x000EEA)</scRipt>

For more information on cross-site scripting vulnerabilities read the
following article on Cross-site Scripting (XSS) -
https://www.netsparker.com/web-vulnerability-scanner/vulnerability-security-checks-index/crosssite-scripting-xss/

Advisory Timeline
--------------------
07/12/2015 - First Contact
17/12/2015 - Vendor Fixed
05/01/2016 - Advisory Released

Solution
--------------------
http://blog.s9y.org/archives/266-Serendipity-2.0.3-released.html

Credits & Authors
--------------------
These issues have been discovered by Selçuk Miynat while testing
Netsparker Web Application Security Scanner -
https://www.netsparker.com/web-vulnerability-scanner/

About Netsparker
--------------------
Netsparker web application security scanners find and report security
flaws and vulnerabilities such as SQL Injection and Cross-site
Scripting (XSS) in all websites and web applications, regardless of
the platform and technology they are built on. Netsparker scanning
engine’s unique detection and exploitation techniques allow it to be
dead accurate in reporting vulnerabilities. The Netsparker web
application security scanner is available in two editions; Netsparker
Desktop and Netsparker Cloud. Visit our website
https://www.netsparker.com for more information.

Onur Yılmaz - National General Manager

Netsparker Web Application Security Scanner
T: +90 (0)554 873 0482
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