CVE-2023-35931

Shescape Project Shescape ≤ 1.7.1

Public PoC

Published

23 June 2023

Modified

21 November 2024

Patch / advisory

View advisory

CVSS Score v3.1 3.1

Click a component to see what it means

Raw vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS Score 0.0081 56th percentile

Risk Priority 30 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-35931 is a low-severity Cleartext Storage of Sensitive Information in an Environment Variable (CWE-526) vulnerability in Shescape Project Shescape. Its CVSS base score is 3.1 (Low).

Operationally, exploitation aligns with the MITRE ATT&CK technique Protocol or Service Impersonation (T1001.003); ranked in the top 44% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2023-1669

Vulnerability Data

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.

CWE(s): CWE-526

Related Threats

MITRE ATT&CK Enterprise Techniques

T1001.003 Protocol or Service Impersonation Command And Control

Adversaries may impersonate legitimate protocols or web service traffic to disguise command and control activity and thwart analysis efforts.

attack.mitre.org →

T1006 Direct Volume Access Stealth

Adversaries may directly access a volume to bypass file access controls and file system monitoring.

attack.mitre.org →

T1007 System Service Discovery Discovery

Adversaries may try to gather information about registered local system services.

attack.mitre.org →

T1014 Rootkit Stealth

Adversaries may use rootkits to hide the presence of programs, files, network connections, services, drivers, and other system components.

attack.mitre.org →

T1016.001 Internet Connection Discovery Discovery

Adversaries may check for Internet connectivity on compromised systems.

attack.mitre.org →

T1020.001 Traffic Duplication Exfiltration

Adversaries may leverage traffic mirroring in order to automate data exfiltration over compromised infrastructure.

attack.mitre.org →

Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-32094Same product: Shescape Project Shescape

CVE-2023-40185Same product: Shescape Project Shescape

CVE-2025-28381Shared CWE-526

CVE-2023-43029Shared CWE-526

CVE-2026-40153Shared CWE-526

CVE-2025-9162Shared CWE-526

CVE-2024-4369Shared CWE-526

CVE-2026-45370Shared CWE-526

CVE-2026-49377Shared CWE-526

CVE-2025-27899Shared CWE-526

Affected Assets

shescape project

shescape

≤ 1.7.1

Mitigating Controls

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.DS-01 partial match

blocks

Encryption and related protections for data-at-rest directly prevent cleartext env-var storage of secrets.

PR.PS-01 partial match

blocks

Hardened configuration baselines and management practices reduce the chance of secrets being left in environment variables.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.5.12 Classification of information partial match

degrades

Classification drives decisions on what must be protected, indirectly discouraging cleartext storage of sensitive data.

A.5.14 Information transfer partial match

removes

A.5.15 Access control partial match

removes

A.5.16 Identity management partial match

removes

A.5.17 Authentication information partial match

degrades

Authentication secrets are a common type of sensitive information; the control requires protecting them, which this weakness violates.