express vulnerable to XSS via response.redirect()

Description

Express.js minimalist web framework for node. In express < 4.20.0, passing untrusted user input - even after sanitizing it - to response.redirect() may execute untrusted code. This issue is patched in express 4.20.0.

Scores

EPSS (exploitation in 30 days)

0.49% · top 58% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.

Weakness

• CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)All about CWE-79 and its CVEs

Affected products

• expressjs · express

  • affected < 4.20.0
  • affected >= 5.0.0-alpha.1, < 5.0.0

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• npmexpressGHSA-qw6h-vgh9-j6wx (opens in a new tab)

References (2)

• https://github.com/expressjs/express/security/advisories/GHSA-qw6h-vgh9-j6wx (opens in a new tab)x_refsource_CONFIRM
• https://github.com/expressjs/express/commit/54271f69b511fea198471e6ff3400ab805d6b553 (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-qw6h-vgh9-j6wx (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2024-43796](https://trackcve.app/badge/CVE-2024-43796.svg)](https://trackcve.app/cve/CVE-2024-43796)

Record last updated 10 Sept 2024, 15:58 UTC.