Is express 3.20 vulnerable?
npm · 4 releases from 3.20.0 to 3.20.3 · latest express is 5.3.0 · checked 1 Nov 2026
Yes: 4 known advisories
Yes. express 3.20.3, the last 3.20 release, is affected by 4 known security advisories (2 medium, 2 low), including CVE-2024-10491, CVE-2024-29041, CVE-2024-9266. Upgrade to 4.20.0 or later to fix all of them.
npm install express@4.20.0Advisories affecting express 3.20.3
Express ressource injection
- Affected
- <4.0.0-rc1
- Fixed in
- 4.0.0-rc1
Express Open Redirect vulnerability
- Affected
- >=3.4.5 <4.0.0-rc1
- Fixed in
- 4.0.0-rc1
express vulnerable to XSS via response.redirect()
- Affected
- <4.20.0 · >=5.0.0-alpha.1 <5.0.0
- Fixed in
- 4.20.0, 5.0.0
Express.js Open Redirect in malformed URLs
- Affected
- <4.19.2 · >=5.0.0-alpha.1 <5.0.0-beta.3
- Fixed in
- 4.19.2, 5.0.0-beta.3
Which of your client projects are still on express 3.20?
NPMscan reads the lockfiles in every GitHub repo you pick, finds the exact express version each one installs, and checks it against these advisories. Each finding comes with the command that fixes it.
Other express versions
Advisory data from OSV.dev (opens OSV.dev in a new tab), which includes the GitHub Advisory Database. Release list from the npm registry. Refreshed daily.