#VU49690 Cross-site scripting in TOS - CVE-2020-28184

Vulnerability identifier: #VU49690

Vulnerability risk: Low

CVSSv4.0: 0.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Clear]

CVE-ID: CVE-2020-28184

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TOS
Client/Desktop applications / Other client software

Vendor: TerraMaster

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 passed via the "mod" parameter in "/module/index.php". A remote authenticated 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

TOS: 4.2.06

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External links
https://www.ihteam.net/advisory/terramaster-tos-multiple-vulnerabilities/
https://www.terra-master.com/

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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. However, proof of concept for this vulnerability is available.