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.
CVE-2025-13204
This high-severity CVE scores 7.3 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 63% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.3
- EG Score
- 7.3(medium)
- EG Risk
- 64(Attend)EG Risk 64/100SSVC: Attend
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity73% × 45%Exploitation40% × 40%Automatability100% × 15%Action: Remediate soon — notable exploitation risk. - EPSS PROB
- 0%
- EPSS %ILE
- 39%
- KEV
- Not listed
Published
November 14, 2025
Last Modified
January 8, 2026
References (7)
- cret@certhttps://github.com/SECCON/SECCON2022_final_CTF/blob/main/jeopardy/web/babybox/solver/solver.py
- cret@certhttps://github.com/jorenbroekema/expr-eval
- cret@certhttps://github.com/silentmatt/expr-eval
- cret@certhttps://github.com/silentmatt/expr-eval/pull/252/files
- cret@certhttps://github.com/vladko312/extras/blob/f549d505af300fd74a01b46fab2102990ff1c14d/expr-eval.py
- cret@certhttps://www.huntr.dev/bounties/1-npm-expr-eval/
- cret@certhttps://www.npmjs.com/package/expr-eval-fork
Patch Availability(1)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| redhat | grafana-pcp-0:1.0.5-5.el8_2 | 2026-01-06 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(2 across 1 ecosystem)
npm(2)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| expr-eval | — | — | — |
| expr-eval-fork | — | 2.0.2 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
All Vendor Advisories
(1)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
Data Freshness Timeline
(refreshed 5× in last 7d / 29× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Showing the most recent 100 of 143 total refreshes for this CVE.
- 2026-09-18 19:27 UTCEPSS rescore
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Frequently asked(5)
What is CVE-2025-13204?
When was CVE-2025-13204 disclosed?
Is CVE-2025-13204 actively exploited?
What is the CVSS score of CVE-2025-13204?
How do I remediate CVE-2025-13204?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-13204
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