Information -------------------- Advisory by Netsparker. Name: Multiple XSS Vulnerabilities in zTree v3 Affected Software : zTree Affected Versions: v3.5.19.1 and possibly below Vendor Homepage : https://github.com/zTree/zTree_v3 Vulnerability Type : Cross-site Scripting Severity : Important Status : Fixed CVE-ID : CVE-2015-7348 Netsparker Advisory Reference : NS-15-019 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 URLs for XSS in zTree 3.5.19.1: /zTree_v3-master/demo/en/asyncData/getNodesForBigData.php?id='"--></style></scRipt><scRipt>alert(0x00FA30)</scRipt> /zTree_v3-master/demo/en/asyncData/getNodes.php (POST, id parameter) For more information on cross-site scripting vulnerabilities read the article Cross-site Scripting (XSS). Advisory Timeline -------------------- 04/09/2015 - First Contact 16/11/2015 - Vendor Fixed 17/11/2015 - Advisory Released Solution -------------------- https://github.com/zTree/zTree_v3 Credits & Authors -------------------- These issues have been discovered by Onur Yilmaz while testing Netsparker Web Application Security Scanner (https://www.netsparker.com). About Netsparker -------------------- Netsparker finds and reports security flaws and vulnerabilities such as SQL Injection and Cross-site Scripting (XSS) in all websites and web applications regardless of the platform and the technology they are built on. Netsparker's unique detection and exploitation techniques allow it to be dead accurate in reporting vulnerabilities, hence it is the first and only False Positive Free web application security scanner. -- Onur Y?lmaz - National General Manager Netsparker Web Application Security Scanner <https://www.netsparker.com> T: +90 (0)554 873 0482