CVE-2025-30222

Shescape has potential environment variable exposure on Windows with CMD

CVSS 2.1 LOWEPSS 0.2%CWE-200

Vexday Risk Score

8Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 2.1EPSS 0.2%KEV nãoPoC —Patch —

Lifecycle

Mar 25, 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U

Affected products

ericcornelissen · shescape

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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