SmartFoxServer 2X 2.17.0 God Mode Console WebSocket XSS

Title: SmartFoxServer 2X 2.17.0 God Mode Console WebSocket XSS
Advisory ID: ZSL-2021-5626
Type: Local/Remote
Impact: Cross-Site Scripting
Risk: (2/5)
Release Date: 07.02.2021
Summary
SmartFoxServer (SFS) is a comprehensive SDK for rapidly developing multiplayer games and applications with Adobe Flash/Flex/Air, Unity, HTML5, iOS, Universal Windows Platform, Android, Java, C++ and more. SmartFoxServer comes with a rich set of features, an impressive documentation set, tens of examples with their source, powerful administration tools and a very active support forum. Born in 2004, and evolving continuously since then, today SmartFoxServer is the leading middleware to create large scale multiplayer games, MMOs and virtual communities. Thanks to its simplicity of use, versatility and performance, it currently powers hundreds of projects all over the world, from small chats and turn-based games to massive virtual worlds and realtime games.
Description
Authenticated Cross-Site Scripting was discovered. Input passed to the AdminTool console is not properly sanitized before being returned to the user. This can be exploited to execute arbitrary HTML code in a user's browser session in context of an affected site.
Vendor
gotoAndPlay() - https://www.smartfoxserver.com
Affected Version
Server: 2.17.0
Remote Admin: 3.2.6
SmartFoxServer 2X, Pro, Basic
Tested On
Windows (all) 64bit installer
Linux/Unix 64bit installer
MacOS (10.8+) 64bit installer
Java 1.8.0_281
Python 3.9.1
Python 2.7.14
Vendor Status
[29.01.2021] Vulnerability discovered.
[29.01.2021] Asked vendor about the console module, how to enable it.
[30.01.2021] No response.
[31.01.2021] Vendor contacted.
[01.02.2021] Vendor asks more details.
[01.02.2021] Sent details to the vendor.
[01.02.2021] Vendor responds.
[01.02.2021] Replied to the vendor, asking for a plan.
[03.02.2021] Vendor will fix the Credentials Disclosure. Other issues are working as expected.
[07.02.2021] Public security advisory released.
PoC
sfs_xss.txt
Credits
Vulnerability discovered by Gjoko Krstic - <gjoko@zeroscience.mk>
References
[1] https://cve.mitre.org/cgi-bin/cvename.cgi?name=2021-26549
[2] https://nvd.nist.gov/vuln/detail/CVE-2021-26549
[3] https://www.exploit-db.com/exploits/49528
[4] https://packetstormsecurity.com/files/161335/
[5] https://cxsecurity.com/issue/WLB-2021020037
[6] https://exchange.xforce.ibmcloud.com/vulnerabilities/196349
[7] https://www.tenable.com/cve/CVE-2021-26549
Changelog
[07.02.2021] - Initial release
[10.02.2021] - Added reference [3], [4], [5], [6] and [7]
Contact
Zero Science Lab

Web: https://www.zeroscience.mk
e-mail: lab@zeroscience.mk