#VU30450 Cross-site scripting in FTP Server - CVE-2020-5195

Vulnerability identifier: #VU30450

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-5195

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FTP Server
Server applications / Other server solutions

Vendor: Cerberus

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 "Reflected XSS through an IMG element" when the attacker. 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
Update to version 11.0.1.

Vulnerable software versions

FTP Server: 11.0.0

---

External links
https://support.cerberusftp.com/hc/en-us/community/topics/360000164199-Announcements
https://www.cerberusftp.com/xss-vulnerability-in-public-shares-fixed-in-cerberus-ftp-server-version-11-0-1-and-10-0-17/
https://www.doyler.net/security-not-included/cerberus-ftp-vulnerabilities

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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