Flask-AppBuilder's OAuth login page subject to Cross Site Scripting (XSS)

Description

Flask-AppBuilder is an application development framework, built on top of Flask. A Cross-Site Scripting (XSS) vulnerability has been discovered on the OAuth login page. An attacker could trick a user to follow a specially crafted URL to the OAuth login page. This URL could inject and execute malicious javascript code that would get executed on the user's browser. This issue was introduced on 4.1.4 and patched on 4.2.1.

Scores

EPSS (exploitation in 30 days)

0.57% · top 53% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.

Weakness

• CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)All about CWE-79 and its CVEs

Affected products

• dpgaspar · Flask-AppBuilder

  • affected >= 4.1.4, < 4.2.1

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• PyPIFlask-AppBuilderGHSA-fqxj-46wg-9v84 (opens in a new tab)

References (2)

• https://github.com/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-fqxj-46wg-9v84 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://github.com/dpgaspar/Flask-AppBuilder/commit/3d17741886e4b3c384d0570de69689e4117aa812 (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-fqxj-46wg-9v84 (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2024-27083](https://trackcve.app/badge/CVE-2024-27083.svg)](https://trackcve.app/cve/CVE-2024-27083)

Record last updated 8 Aug 2024, 19:24 UTC.