CVE-2023-35931 — Shescape is a simple shell escape library for JavaScript

Shescape is a simple shell escape library for JavaScript. An attacker may be able to get read-only access to environment variables. This bug has been patched in version 1.7.1.

01What is this vulnerability?

Shescape is a simple shell escape library for JavaScript. An attacker may be able to get read-only access to environment variables. This bug has been patched in version 1.7.1.

02Affected products

Vendor	Product	Versions
ericcornelissen	shescape	< 1.7.1

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-06-23T19:32:53.897Z
• Last modified: 2024-12-05T16:09:33.483Z

09References

• github.com — https://github.com/ericcornelissen/shescape/security/advisories/GHSA-3g7p-8qhx-m…
• github.com — https://github.com/ericcornelissen/shescape/pull/982
• github.com — https://github.com/ericcornelissen/shescape/commit/d0fce70f987ac0d8331f93cb45d47…
• github.com — https://github.com/ericcornelissen/shescape/releases/tag/v1.7.1