What is the CVSS score of CVE-2023-46308?

CVE-2023-46308 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

How to fix or mitigate CVE-2023-46308?

Within 7 days: Identify all affected systems running Plotly plotly.js and apply vendor patches promptly. Monitor vendor channels for patch availability.

Plotly CVE-2023-46308

CRITICAL

Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution) (CWE-1321)

2024-01-03 cve@mitre.org

Information Disclosure Prototype Pollution Plotly Js Plotly

9.8

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-1321 OWASP Top 10:2025 A03:2021 - Injection ASVS 5.0 V3 - Web Frontend Security Prototype pollution prevention MITRE ATT&CK 2 techniques across 2 tactics: Execution, Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 0.15%.
Exploit ScenarioDerived	A remote attacker could modify object prototypes to inject properties affecting application logic by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 28, 2026

In Plotly plotly.js before 2.25.2, plot API calls have a risk of __proto__ being polluted in expandObjectPaths or nestedProperty. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution) vulnerability could allow attackers to modify object prototypes to inject properties affecting application logic.

Earlier versions of this analysis (1)

v1 Mar 28, 2026 - 19:33 CVSS 9.8

Prototype pollution in Plotly.js.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Freeze prototypes, validate object keys, avoid recursive merging of untrusted data.

Affected Packages

composer plotly.js fix: 2.25.2

composer plotly/plotly.js fix: 2.25.2

npm plotly.js fix: 2.25.2

npm plotly/plotly.js fix: 2.25.2

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in composer, npm

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution) (CWE-1321), which allows attackers to modify object prototypes to inject properties affecting application logic. In Plotly plotly.js before 2.25.2, plot API calls have a risk of __proto__ being polluted in expandObjectPaths or nestedProperty. Affected products include: Plotly Plotly.Js. Version information: before 2.25.2.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

CVE Published

Jan 03, 2024 - 05:15 nvd

CRITICAL 9.8

DescriptionCVE.org

In Plotly plotly.js before 2.25.2, plot API calls have a risk of __proto__ being polluted in expandObjectPaths or nestedProperty.

Executive ViewAI

Why It Matters

Organizations using Plotly plotly.js face critical risk from CVE-2023-46308, a prototype pollution vulnerability rated CVSS 9.8. Successful exploitation could critically impact the confidentiality, integrity, and availability of affected systems. Organizations should apply vendor updates immediately when available and implement compensating controls in the interim.

Business Impact: Severe

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.

Threat Intelligence Overview

EPSS Score

0.2%

Top 64% exploitable

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC No

EPSS 0.2%

Patch available Yes

Active threat No

Deciding rule

CRITICAL severity

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Out-of-Cycle

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +49

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.