Cross-site scripting in Vega library (NPM)

1) Cross-site scripting

EUVDB-ID: #VU50605

Risk: Medium

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26296

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

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 Vega expressions. 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 update from vendor's website.

Vulnerable software versions

vega: 3.0.0 - 5.17.2

CPE2.3

• cpe:2.3:a:vega:vega:5.17.2:*:*:*:*:*:*:*
• cpe:2.3:a:vega:vega:5.17.1:*:*:*:*:*:*:*
• cpe:2.3:a:vega:vega:5.17.0:*:*:*:*:*:*:*

External links

http://github.com/vega/vega/issues/3018
http://github.com/vega/vega/pull/3019
http://github.com/vega/vega/releases/tag/v5.17.3
http://github.com/vega/vega/security/advisories/GHSA-r2qc-w64x-6j54
http://www.npmjs.com/package/vega

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.