CVE-2025-30222 Shescape has potential environment variable exposure on Windows with CMD
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2025-30222?
CVE-2025-30222 is a low-severity vulnerability in ericcornelissen shescape, published on 25 Mar 2025.
Official description
Shescape is a simple shell escape library for JavaScript. Versions 1.7.2 through 2.1.1 are vulnerable to potential environment variable exposure on Windows with CMD. This impact users of Shescape on Windows that explicitly configure `shell: 'cmd.exe'` or `shell: true` using any of `quote`/`quoteAll`/`escape`/`escapeAll`. An attacker may be able to get read-only access to environment variables. This bug has been patched in v2.1.2. For those who are already using v2 of Shescape, no further changes are required. Those who are are using v1 of Shescape should follow the migration guide to upgrade to v2. There is no plan to release a patch compatible with v1 of Shescape. As a workaround, users can remove all instances of `%` from user input before using Shescape.
Weakness: CWE-200
Which versions are affected by CVE-2025-30222?
2 open source packages ship an affected version, including shescape.
| Package | Affected | Fixed in |
|---|---|---|
shescape npm | From 1.7.2 | 2.1.2 |
shescape npm | From 1.7.2 | 2.1.2 |
How do I fix CVE-2025-30222?
Upgrade shescape to 2.1.2 or later.
Is CVE-2025-30222 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-30222 exists.
Sources
Also known as GHSA-66pp-5p9w-q87j.