CVE-2013-7452: Node.js validator XSS filter bypass via javascript URI

CVE-2013-7452 · Severity: medium · CVSS 6.1 · Published 2017-01-23

The validator library for Node.js, which is used by developers to sanitize and verify user input, contains a flaw in its cross-site scripting (XSS) filter. An attacker can bypass this security protection by using specially crafted 'javascript:' links. If successful, this could allow an attacker to execute malicious scripts in a user's browser, potentially leading to unauthorized actions or the theft of sensitive session information.

Technologies: Nodejs Node.Js, validator (npm), Validator.Js Project Validator. Vendors: Nodejs, npm, Validator.Js Project.

Quick answers

Is CVE-2013-7452 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2013-7452 being exploited in the wild.
How severe is CVE-2013-7452?
Medium severity, with a CVSS score of 6.1, published 23 January 2017.
Which products and versions are affected?
validator (npm) SEMVER:introduced=0,fixed=1.1.0; Validator.Js Project Validator < 1.1.0.
Is there a fix for CVE-2013-7452?
Yes. validator (npm): upgrade to 1.1.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2013-7452 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2013-7452?
Check whether you run Nodejs Node.Js, validator (npm) or Validator.Js Project Validator at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • validator (npm): upgrade to 1.1.0 or later
    npm install validator@1.1.0

Technical details

A vulnerability exists in the validator library for Node.js (versions prior to 1.1.0) where the XSS filtering logic fails to properly sanitize 'javascript:' URIs. By crafting a specific URI, a remote attacker can bypass the filter to inject and execute arbitrary JavaScript in the context of the victim's browser session. This is a classic XSS filter bypass that occurs during input validation or sanitization. The issue is resolved in version 1.1.0 and later. Exploitation typically requires a user to interact with a malicious link or for the application to render the unsanitized input.

Affected products

  • Node.js validator < 1.1.0

Identifiers

  • CVE-2013-7452
  • GHSA-rh6c-q938-3r9q

Timeline

  • 2013-12-12: disclosed: Original vulnerability discovery date (based on CVE year)
  • 2016-04-20: advisory: Public disclosure on oss-security mailing list
  • 2017-01-23: advisory: NVD publication date

References

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