CVE-2025-12735
CVE-2025-12735
Description
The expr-eval library is a JavaScript expression parser and evaluator designed to safely evaluate mathematical expressions with user-defined variables. However, due to insufficient input validation, an attacker can pass a crafted context object or use MEMBER of the context object into the evaluate() function and trigger arbitrary code execution.
INFO
Published Date :
Nov. 5, 2025, 1:15 a.m.
Last Modified :
Nov. 20, 2025, 4:15 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2025-12735
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update the expr-eval library to a secure version.
- Sanitize all user-provided input before evaluation.
- Avoid evaluating untrusted expressions.
Public PoC/Exploit Available at Github
CVE-2025-12735 has a 3 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-12735.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-12735 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-12735
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Security research tool for detecting and testing CVE-2025-12735 (expr-eval RCE vulnerability)
Python
Security research tool for detecting and testing CVE-2025-12735 (expr-eval RCE vulnerability)
Python
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-12735 vulnerability anywhere in the article.
-
BleepingComputer
Popular JavaScript library expr-eval vulnerable to RCE flaw
A critical vulnerability in the popular expr-eval JavaScript library, with over 800,000 weekly downloads on NPM, can be exploited to execute code remotely through maliciously crafted input. The securi ... Read more
-
CybersecurityNews
Critical Vulnerability in Popular NPM Library Exposes AI and NLP Apps to Remote Code Execution
A critical security flaw has been discovered in the widely used npm package expr-eval, potentially exposing AI and natural language processing applications to remote code execution attacks. The vulner ... Read more
The following table lists the changes that have been made to the
CVE-2025-12735 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Nov. 20, 2025
Action Type Old Value New Value Changed Description The expr-eval library is a JavaScript expression parser and evaluator designed to safely evaluate mathematical expressions with user-defined variables. However, due to insufficient input validation, an attacker can pass a crafted variables object into the evaluate() function and trigger arbitrary code execution. The expr-eval library is a JavaScript expression parser and evaluator designed to safely evaluate mathematical expressions with user-defined variables. However, due to insufficient input validation, an attacker can pass a crafted context object or use MEMBER of the context object into the evaluate() function and trigger arbitrary code execution. -
CVE Modified by [email protected]
Nov. 13, 2025
Action Type Old Value New Value Added Reference https://github.com/advisories/GHSA-jc85-fpwf-qm7x Added Reference https://kb.cert.org/vuls/id/263614 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Nov. 10, 2025
Action Type Old Value New Value Added Reference https://github.com/jorenbroekema/expr-eval/blob/460b820ba01c5aca6c5d84a7d4f1fa5d1913c67b/test/security.js -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 08, 2025
Action Type Old Value New Value Added Reference https://www.kb.cert.org/vuls/id/263614 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Nov. 05, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by [email protected]
Nov. 05, 2025
Action Type Old Value New Value Added Description The expr-eval library is a JavaScript expression parser and evaluator designed to safely evaluate mathematical expressions with user-defined variables. However, due to insufficient input validation, an attacker can pass a crafted variables object into the evaluate() function and trigger arbitrary code execution. Added Reference https://github.com/jorenbroekema/expr-eval Added Reference https://github.com/silentmatt/expr-eval Added Reference https://github.com/silentmatt/expr-eval/pull/288 Added Reference https://www.npmjs.com/package/expr-eval Added Reference https://www.npmjs.com/package/expr-eval-fork