RCE in Expr-eval-fork
CVE-2025-12735
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 o…
Vulnerability class: RCE (Remote Code Execution)
EPSS: 0.022 (80.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Expr-eval-fork — versions 0
- Jorenbroekema Javascript_expression_evaluator — versions 3.0.0
- Silentmatt Expr-eval — versions 0
- Silentmatt Javascript_expression_evaluator
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cret@cert.org (Product)
- cret@cert.org (Product)
- cret@cert.org (Product)
- cret@cert.org (Product)
- cret@cert.org (Patch, Issue Tracking)
- cret@cert.org (Third Party Advisory, third-party-advisory)
- cret@cert.org (Third Party Advisory, third-party-advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Product)
Frequently asked questions
- What is CVE-2025-12735?
- CVE-2025-12735 is a critical-severity vulnerability in Expr-eval-fork, classified under Code Injection. CVSS score: 9.8/10. Published 2025-11-05.
- How severe is CVE-2025-12735?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2025-12735 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.