---
title: "CVE-2023-46308: plotly.js prototype pollution vulnerability"
url: https://erroneo.us/security/cve/CVE-2023-46308/
description: "CVE-2023-46308 (plotly/plotly.js (Composer (PHP))): In Plotly plotly.js before 2.25.2, plot API calls have a risk of proto being polluted in…"
type: vulnerability-record
section: "Security Digest"
date_published: 2024-01-03
date_modified: 2025-12-26
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2023-46308"
kev: false
cvss: 9.8
epss: 0.00936
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2023-46308: plotly.js prototype pollution vulnerability

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.9% , percentile 60: FIRST’s model estimates a 0.9% chance of exploitation activity in the next 30 days, higher than 60% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes plotly/plotly.js (Composer (PHP)) < 2.25.2, fixed in 2.25.2 ; plotly.js (npm) < 2.25.2, fixed in 2.25.2 . Check your lockfile, including transitive dependencies.

## What it is

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

## Affected packages

- Composer (PHP) `plotly/plotly.js` < 2.25.2 → fixed: 2.25.2
- npm `plotly.js` < 2.25.2 → fixed: 2.25.2

## Affected products (CVE record)

- n/a n/a: see advisory

## Severity

- CISA-ADP CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.94% probability of exploitation activity in the next 30 days; percentile 60.

## Sources

- [GitHub Advisory GHSA-wjc4-73q6-gv3m](https://github.com/advisories/GHSA-wjc4-73q6-gv3m)
- [CVE.org record CVE-2023-46308](https://www.cve.org/CVERecord?id=CVE-2023-46308)
- [NVD entry CVE-2023-46308](https://nvd.nist.gov/vuln/detail/CVE-2023-46308)
- [plotly.com](https://plotly.com/javascript/)
- [github.com](https://github.com/plotly/plotly.js/releases/tag/v2.25.2)
- [github.com](https://github.com/plotly/plotly.R/issues/2463)
- [github.com](https://github.com/plotly/plotly.js/commit/02498404c8ad7a3395191e65694fb142a37b0fe9)
- [github.com](https://github.com/plotly/plotly.js/commit/5efd2a1f07a418b230a5626fc6c1c7929c47949d)

---
Source page: https://erroneo.us/security/cve/CVE-2023-46308/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt