---
title: "CVE-2024-25128: Flask-AppBuilder vulnerable to incorrect authentication when using auth type OpenID"
url: https://erroneo.us/security/cve/CVE-2024-25128/
description: "CVE-2024-25128 (Flask-AppBuilder (PyPI)): Flask-AppBuilder is an application development framework, built on top of Flask. When Flask-AppBuilder is set to…"
type: vulnerability-record
section: "Security Digest"
date_published: 2024-02-28
date_modified: 2026-03-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2024-25128"
kev: false
cvss: 9.1
epss: 0.00857
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2024-25128: Flask-AppBuilder vulnerable to incorrect authentication when using auth type OpenID

**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 58: FIRST’s model estimates a 0.9% chance of exploitation activity in the next 30 days, higher than 58% 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 Flask-AppBuilder (PyPI) < 4.3.11, fixed in 4.3.11 . Check your lockfile, including transitive dependencies.

## What it is

Flask-AppBuilder is an application development framework, built on top of Flask. When Flask-AppBuilder is set to AUTHTYPE AUTHOID, it allows an attacker to forge an HTTP request, that could deceive the backend into using any requested OpenID service. This vulnerability could grant an attacker unauthorised privilege access if a custom OpenID service is deployed by the attacker and accessible by the backend. This vulnerability is only exploitable when the application is using the OpenID 2.0 authorization protocol. Upgrade to Flask-AppBuilder 4.3.11 to fix the vulnerability.

## Affected packages

- PyPI `Flask-AppBuilder` < 4.3.11 → fixed: 4.3.11

## Affected products (CVE record)

- dpgaspar Flask-AppBuilder: < 4.3.11

## Severity

- GitHub_M CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`
- GitHub CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`

## 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): 0.86% probability of exploitation activity in the next 30 days; percentile 58.

## Sources

- [GitHub Advisory GHSA-j2pw-vp55-fqqj](https://github.com/advisories/GHSA-j2pw-vp55-fqqj)
- [CVE.org record CVE-2024-25128](https://www.cve.org/CVERecord?id=CVE-2024-25128)
- [NVD entry CVE-2024-25128](https://nvd.nist.gov/vuln/detail/CVE-2024-25128)
- [github.com](https://github.com/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-j2pw-vp55-fqqj)
- [github.com](https://github.com/dpgaspar/Flask-AppBuilder/commit/6336456d83f8f111c842b2b53d1e89627f2502c8)

---
Source page: https://erroneo.us/security/cve/CVE-2024-25128/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt