#VU21244 Stored cross-site scripting in ZrLog - CVE-2018-17079

Vulnerability identifier: #VU21244

Vulnerability risk: Medium

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Green]

CVE-ID: CVE-2018-17079

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ZrLog
Web applications / CMS

Vendor: ZrLog

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 in the nickname field of the comment area. A remote attacker can permanently inject 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

ZrLog: 2.0.1

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External links
https://github.com/94fzb/zrlog/issues/38

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