#VU73795 Cross-site scripting in vega - CVE-2023-26487

Vulnerability identifier: #VU73795

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-2023-26487

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
vega
Web applications / JS libraries

Vendor: Vega

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 "lassoAppend" function. 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

vega: 5.0.0 - 5.22.1

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External links
https://github.com/vega/vega/releases/tag/v5.23.0
https://github.com/vega/vega/commit/01adb034f24727d3bb321bbbb6696a7f4cd91689
https://github.com/vega/vega/security/advisories/GHSA-w5m3-xh75-mp55

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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.