expr-eval vulnerable to Prototype Pollution - expr-eval

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.

Recommendation

No fix is available yet. Followings are affected versions:

• <= 2.0.2

References

• GHSA-8gw3-rxh4-v6jx
• www.npmjs.com
• www.huntr.dev
• CVE-2025-13204
• CWE-1321
• CAPEC-310
• OWASP 2021-A6

Related Issues

• expr-eval vulnerable to Prototype Pollution - CVE-2025-13204
• node-cube vulnerable to prototype pollution - CVE-2025-57348
• rollbar vulnerable to Prototype Pollution in merge() - CVE-2025-62517
• query-parser-string is vulnerable to Prototype Pollution - CVE-2025-63704

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How to Secure your NodeJs Express Javascript Application - part 1

How to Secure your NodeJs Express Javascript Application - part 2

10 Secure Coding Best Practices to Follow in Every Project

Tags:

npm

expr-eval