CVE-2025-13204

HIGH EPSS 33.1%
Published Nov 14, 20257mo ago · Modified Jun 17, 20262w ago
7.3 CVSS 3.1
High
Find Similar
Published Nov 14, 2025 7mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.3
Exploitability
3.9
Impact
3.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability Low

Threat Intelligence

EPSS Exploit Probability
33.1% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-1321

Affected Products 1

VendorProductVersionRange
silentmattjavascript_expression_evaluator*any

References 7

  • github.com https://github.com/SECCON/SECCON2022_final_CTF/blob/main/jeopardy/web/babybox/solver/solver.py
    Product
  • github.com https://github.com/jorenbroekema/expr-eval
    Product
  • github.com https://github.com/silentmatt/expr-eval
    Product
  • github.com https://github.com/silentmatt/expr-eval/pull/252/files
    Issue TrackingPatch
  • github.com https://github.com/vladko312/extras/blob/f549d505af300fd74a01b46fab2102990ff1c14d/expr-eval.py
    Product
  • huntr.dev https://www.huntr.dev/bounties/1-npm-expr-eval/
    ExploitThird Party Advisory
  • npmjs.com https://www.npmjs.com/package/expr-eval-fork
    Product

Remediation

  • github.com https://github.com/silentmatt/expr-eval/pull/252/files
    Issue TrackingPatch