How severe is CVE-2025-13204?

CVE-2025-13204 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-13204 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-13204?

CVE-2025-13204 affects Silentmatt Javascript Expression Evaluator. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-13204?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-13204 have an EU (EUVD) identifier?

Yes. CVE-2025-13204 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-197614.

When was CVE-2025-13204 published?

CVE-2025-13204 was published on 2025-11-14 and last updated on 2026-06-17.

CVE-2025-13204

CVE-2025-13204 is a high-severity vulnerability in Silentmatt Javascript Expression Evaluator with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1321.

Key facts

Severity: High (CVSS 3.x base score 7.3)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-197614
Weakness: CWE-1321
Affected product: Silentmatt Javascript Expression Evaluator
Published: 2025-11-14
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2025-13204?: 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.
How severe is CVE-2025-13204?: CVE-2025-13204 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-13204 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-13204?: CVE-2025-13204 affects Silentmatt Javascript Expression Evaluator. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-13204?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-13204 have an EU (EUVD) identifier?: Yes. CVE-2025-13204 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-197614.
When was CVE-2025-13204 published?: CVE-2025-13204 was published on 2025-11-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:silentmatt:javascript_expression_evaluator:*:*:*:*:*:node.js:*:*

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