How severe is CVE-2025-12735?

CVE-2025-12735 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-12735 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-12735?

CVE-2025-12735 primarily affects Jorenbroekema Javascript Expression Evaluator. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-12735?

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

Does CVE-2025-12735 have an EU (EUVD) identifier?

Yes. CVE-2025-12735 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-37820.

When was CVE-2025-12735 published?

CVE-2025-12735 was published on 2025-11-05 and last updated on 2026-06-17.

CVE-2025-12735

CVE-2025-12735 is a critical-severity vulnerability in Jorenbroekema Javascript Expression Evaluator with a CVSS 3.x base score of 9.8. 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-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-37820
Weakness: CWE-94
Affected product: Jorenbroekema Javascript Expression Evaluator
Published: 2025-11-05
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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 object or use MEMBER of the context object into the evaluate() function and trigger arbitrary code execution.
How severe is CVE-2025-12735?: CVE-2025-12735 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-12735 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-12735?: CVE-2025-12735 primarily affects Jorenbroekema Javascript Expression Evaluator. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-12735?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-12735 have an EU (EUVD) identifier?: Yes. CVE-2025-12735 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-37820.
When was CVE-2025-12735 published?: CVE-2025-12735 was published on 2025-11-05 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:jorenbroekema:javascript_expression_evaluator:3.0.0:*:*:*:*:node.js:*:*
cpe:2.3:a:silentmatt:javascript_expression_evaluator:*:*:*:*:*:node.js:*:*

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