#VU45777 Cross-site scripting in Rocket.Chat


Published: 2020-08-19

Vulnerability identifier: #VU45777

Vulnerability risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-15926

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Rocket.Chat
Web applications / Forum & blogging software

Vendor: Rocket.Chat Technologies Corp.

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Rocket.Chat: 3.4.0 - 3.4.2


External links
http://blog.redteam.pl/2020/08/rocket-chat-xss-rce-cve-2020-15926.html
http://github.com/RocketChat/Rocket.Chat/commits/develop
http://github.com/RocketChat/Rocket.Chat/pull/18356


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


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