---
title: "CVE-2023-6015: MLflow allowed arbitrary files to be PUT onto the server"
url: https://erroneo.us/security/cve/CVE-2023-6015/
description: "CVE-2023-6015 (mlflow (PyPI)): MLflow allowed arbitrary files to be PUT onto the server."
type: vulnerability-record
section: "Security Digest"
date_published: 2023-11-16
date_modified: 2024-08-02
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2023-6015"
kev: false
cvss: 10.0
epss: 0.04444
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2023-6015: MLflow allowed arbitrary files to be PUT onto the server

**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. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 4.4% , percentile 91: FIRST’s model estimates a 4.4% chance of exploitation activity in the next 30 days, higher than 91% of all scored CVEs (elevated). 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 mlflow (PyPI) < 2.8.1, fixed in 2.8.1 . Check your lockfile, including transitive dependencies.

## What it is

MLflow allowed arbitrary files to be PUT onto the server.

## Affected packages

- PyPI `mlflow` < 2.8.1 → fixed: 2.8.1

## Affected products (CVE record)

- mlflow mlflow/mlflow: unspecified <= latest

## Severity

- @huntr_ai CVSS 3.0: 10 `CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N`
- GitHub CVSS 3.1: 10.0 `CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- FIRST EPSS (model of 2026-10-21): 4.44% probability of exploitation activity in the next 30 days; percentile 91.

## Sources

- [GitHub Advisory GHSA-f798-qm4r-23r5](https://github.com/advisories/GHSA-f798-qm4r-23r5)
- [CVE.org record CVE-2023-6015](https://www.cve.org/CVERecord?id=CVE-2023-6015)
- [NVD entry CVE-2023-6015](https://nvd.nist.gov/vuln/detail/CVE-2023-6015)
- [huntr.com](https://huntr.com/bounties/43e6fb72-676e-4670-a225-15d6836f65d3)
- [github.com](https://github.com/mlflow/mlflow/pull/10330)
- [github.com](https://github.com/mlflow/mlflow/commit/cf83dad4df26dd4a850622fe8a51ccab1471a5e7)

---
Source page: https://erroneo.us/security/cve/CVE-2023-6015/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt