High severityNVD Advisory· Published Nov 5, 2025· Updated Nov 22, 2025
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
expr-evalnpm | <= 2.0.2 | — |
expr-eval-forknpm | < 3.0.1 | 3.0.1 |
Affected products
9- osv-coords7 versionspkg:apk/chainguard/kibana-8.19pkg:apk/chainguard/kibana-8.19-bitnamipkg:apk/chainguard/kibana-8.19-iamguardedpkg:apk/chainguard/kibana-9.0-bitnamipkg:apk/chainguard/kibana-9.2pkg:npm/expr-evalpkg:npm/expr-eval-fork
< 8.19.15-r0+ 6 more
- (no CPE)range: < 8.19.15-r0
- (no CPE)range: < 8.19.15-r0
- (no CPE)range: < 8.19.15-r0
- (no CPE)range: < 9.0.8-r32
- (no CPE)range: < 9.2.5-r0
- (no CPE)range: <= 2.0.2
- (no CPE)range: < 3.0.1
- expr-eval-fork/expr-eval-forkv5Range: 0
- silentmatt/expr-evalv5Range: 0
Patches
Vulnerability mechanics
References
10- github.com/advisories/GHSA-jc85-fpwf-qm7xghsathird-party-advisoryADVISORY
- kb.cert.org/vuls/id/263614ghsathird-party-advisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2025-12735ghsaADVISORY
- github.com/jorenbroekema/expr-eval/blob/460b820ba01c5aca6c5d84a7d4f1fa5d1913c67b/test/security.jsghsaWEB
- github.com/jorenbroekema/expr-eval/commit/1d71bb2ca8f98df8de00e9cc4de8fdd468a7ad43ghsaWEB
- github.com/silentmatt/expr-eval/pull/288ghsaWEB
- github.com/silentmatt/expr-eval/pull/289ghsaWEB
- www.kb.cert.org/vuls/id/263614ghsaWEB
- www.npmjs.com/package/expr-evalghsaWEB
- www.npmjs.com/package/expr-eval-forkghsaWEB
News mentions
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