#VU80772 Prototype pollution in fast-xml-parser - CVE-2023-26920

Vulnerability identifier: #VU80772

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-26920

CWE-ID: CWE-1321

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
fast-xml-parser
Other software / Other software solutions

Vendor: Natural Intelligence

Description

The vulnerability allows a remote attacker to execute arbitrary JavaScript code.

The vulnerability exists due to improper input validation. A remote attacker can pass specially crafted input to the application and perform prototype pollution, which can result in information disclosure or data manipulation.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

fast-xml-parser: before 4.1.2

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External links
https://www.ibm.com/support/pages/node/7029864

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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.