Description
npm package `expr-eval` is vulnerable to Prototype Pollution. An attacker with access to express eval interface can use JavaScript prototype-based inheritance model to achieve arbitrary code execution. The npm expr-eval-fork package resolves this issue.
Published: 2025-11-14
Score: 7.3 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-8gw3-rxh4-v6jx expr-eval vulnerable to Prototype Pollution
History

Thu, 08 Jan 2026 18:30:00 +0000

Type Values Removed Values Added
First Time appeared Silentmatt
Silentmatt javascript Expression Evaluator
CPEs cpe:2.3:a:silentmatt:javascript_expression_evaluator:*:*:*:*:*:node.js:*:*
Vendors & Products Silentmatt
Silentmatt javascript Expression Evaluator

Tue, 25 Nov 2025 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-915
References
Metrics threat_severity

None

threat_severity

Important


Sat, 15 Nov 2025 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Expr-eval Project
Expr-eval Project expr-eval
Vendors & Products Expr-eval Project
Expr-eval Project expr-eval

Fri, 14 Nov 2025 21:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1321
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 14 Nov 2025 20:30:00 +0000


Fri, 14 Nov 2025 17:15:00 +0000

Type Values Removed Values Added
Description npm package `expr-eval` is vulnerable to Prototype Pollution. An attacker with access to express eval interface can use JavaScript prototype-based inheritance model to achieve arbitrary code execution. The npm expr-eval-fork package resolves this issue.
Title CVE-2025-13204
References

Subscriptions

Expr-eval Project Expr-eval
Silentmatt Javascript Expression Evaluator
cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2025-11-14T20:41:22.990Z

Reserved: 2025-11-14T16:52:35.957Z

Link: CVE-2025-13204

cve-icon Vulnrichment

Updated: 2025-11-14T20:39:10.929Z

cve-icon NVD

Status : Analyzed

Published: 2025-11-14T17:16:01.603

Modified: 2026-01-08T18:28:13.923

Link: CVE-2025-13204

cve-icon Redhat

Severity : Important

Publid Date: 2025-11-14T17:02:39Z

Links: CVE-2025-13204 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-11-15T22:07:49Z

Weaknesses