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Medium

Cross-site Scripting (XSS) in serialize-javascript

  • Disclosed: 10.02.2025
  • Updated: 16.10.2026 00:17

A flaw was found in npm-serialize-javascript. The vulnerability occurs because the serialize-javascript module does not properly sanitize certain inputs, such as regex or other JavaScript object types, allowing an attacker to inject malicious code. This code could be executed when deserialized by a web browser, causing Cross-site scripting (XSS) attacks. This issue is critical in environments where serialized data is sent to web clients, potentially compromising the security of the website or web application using this package.

Affected software

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PlatformPackageVulnerable versionsFixed in
npm package serialize-javascript >= 6.0.0, < 6.0.2 6.0.2

References

CVSS score 5.4/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE)
CWE-79
Platform
npm
Package
serialize-javascript
Disclosed
10.02.2025
Updated
16.10.2026 00:17

Sources and licenses

OSV / GitHub Advisory Database - GHSA-76p7-773f-r4q5 - CC BY 4.0

Vulnerability history: serialize-javascript

All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.

Total entries
6
First → latest
12.2019 09.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • High 2
  • Medium 3
  • Low 1

Disclosures per year

  1. Serialize JavaScript: Cross-site scripting (XSS) via unescaped </script> in serialized function bodies
    Low CVE-2026-97711 >= 7.1.1, < 7.1.2 7.1.2
  2. Serialize JavaScript has CPU Exhaustion Denial of Service via crafted array-like objects
    Medium · 5.9 CVE-2026-34043 >= 5.0.0, < 7.0.5 7.0.5
  3. Serialize JavaScript is Vulnerable to RCE via RegExp.flags and Date.prototype.toISOString()
    High · 8.1 ghsa-5c6j-r48x-rmvq < 7.0.3 7.0.3
  4. Cross-site Scripting (XSS) in serialize-javascript this entry
    Medium · 5.4 CVE-2024-11831 >= 6.0.0, < 6.0.2 6.0.2
  5. Insecure serialization leading to RCE in serialize-javascript
    High · 8.1 CVE-2020-7660 < 3.1.0 3.1.0
  6. Cross-Site Scripting in serialize-javascript
    Medium · 4.2 CVE-2019-16769 < 2.1.1 2.1.1

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