#VU59835 Cross-site scripting in Crow - CVE-2021-23824

Vulnerability identifier: #VU59835

Vulnerability risk: Low

CVSSv4.0: 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:P/U:Clear]

CVE-ID: CVE-2021-23824

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Crow
Server applications / Frameworks for developing and running applications

Vendor: CrowCpp

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 updates from vendor's website.

Vulnerable software versions

Crow: 0.1 - 0.3+3

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External links
https://github.com/CrowCpp/Crow/pull/317
https://github.com/CrowCpp/Crow/releases/tag/v0.3%2B4
https://snyk.io/vuln/SNYK-UNMANAGED-CROW-2336164

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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.