CVE-2025-30222: Information Disclosure

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.

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Weakness Type (CWE)

CWE-200 CWE-200

References

Other References

https://github.com/ericcornelissen/shescape/commit/0a81f1eb077bab8caae283a2490cd7be9af179c6 https://github.com/ericcornelissen/shescape/pull/1916 https://github.com/ericcornelissen/shescape/releases/tag/v2.1.2 https://github.com/ericcornelissen/shescape/security/advisories/GHSA-66pp-5p9w-q87j https://github.com/ericcornelissen/shescape/security/advisories/GHSA-66pp-5p9w-q87j

Frequently Asked Questions

What is CVE-2025-30222? +

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.

How do I check if I'm vulnerable to CVE-2025-30222? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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