CVE-2025-13204

Name: CVE-2025-13204
Creator: NVD / NIST
Published: 2025-11-14T17:16:01.603+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.3/10EPSS 0.41%

Last modified Jun 17, 2026

CVE-2025-13204 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. 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. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.3/10

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

EPSS Probability

0.41%

33.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1321

Affected Software

Vendor	Product	Versions
Silentmatt	Javascript Expression Evaluator	All versions

References

https://github.com/SECCON/SECCON2022_final_CTF/blob/main/jeopardy/web/babybox/solver/solver.pyProduct
https://github.com/jorenbroekema/expr-evalProduct
https://github.com/silentmatt/expr-evalProduct
https://github.com/silentmatt/expr-eval/pull/252/filesIssue Tracking, Patch
https://github.com/vladko312/extras/blob/f549d505af300fd74a01b46fab2102990ff1c14d/expr-eval.pyProduct
https://www.huntr.dev/bounties/1-npm-expr-eval/Exploit, Third Party Advisory
https://www.npmjs.com/package/expr-eval-forkProduct

Timeline

Published: Nov 14, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-13204?

How severe is CVE-2025-13204?

CVE-2025-13204 has a CVSS score of 7.3/10 (HIGH severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2025-13204?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-13204?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST