CVE-2019-16769: Verizon Serialize-JavaScript

Medium severity, CVSS 5.4. EPSS: 0.8% chance of exploitation in the next 30 days.

The serialize-javascript npm package before version 2.1.1 is vulnerable to Cross-site Scripting (XSS). It does not properly mitigate against unsafe characters in serialized regular expressions. This vulnerability is not affected on Node.js environment since Node.js's implementation of RegExp.prototype.toString() backslash-escapes all forward slashes in regular expressions. If serialized data of regular expression objects are used in an environment other than Node.js, it is affected by this vulnerability.

Affected products

• Verizon Serialize-JavaScript: before 2.1.1 (fixed in 2.1.1)

Published 2019-12-05. Last modified 2026-06-17.