GHSA-8gw3-rxh4-v6jx · Severity: high · Ecosystem: npm — expr-eval vulnerable to Prototype Pollution
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.
Conclusion & alert: CVE-2025-13204 is rated Exploit Available (56/100): CVSS High severity, with low exploitation likelihood (EPSS 0.41%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.04% | 0.41% | +0.37% |
| 2 | 2026-06-10 | 0.06% | 0.04% | -0.01% |
| 3 | 2026-04-24 | — | 0.06% | — |
Full EPSS history (5 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.3 | 3.1 | HIGH |
|
3.9 | 3.4 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
GHSA-8gw3-rxh4-v6jx · Severity: high · Ecosystem: npm — expr-eval vulnerable to Prototype Pollution
| vendor | priority | summary | link |
|---|---|---|---|
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2025-13204 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| silentmatt | javascript_expression_evaluator | — | cpe:2.3:a:silentmatt:javascript_expression_evaluator:*:*:*:*:*:node.js:*:* |
| URL | Tags |
|---|---|
| https://github.com/SECCON/SECCON2022_final_CTF/blob/main/jeopardy/web/babybox/solver/solver.py | Product |
| https://github.com/jorenbroekema/expr-eval | Product |
| https://github.com/silentmatt/expr-eval | Product |
| https://github.com/silentmatt/expr-eval/pull/252/files | Issue Tracking Patch |
| https://github.com/vladko312/extras/blob/f549d505af300fd74a01b46fab2102990ff1c14d/expr-eval.py | Product |
| https://www.huntr.dev/bounties/1-npm-expr-eval/ | Exploit Third Party Advisory |
| https://www.npmjs.com/package/expr-eval-fork | Product |