PYSEC-2026-1381

vendorUSosv

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

view advisory published 2026-07-07Licence: CC-BY-4.0

### Impact 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. Impacted versions: Flask-AppBuilder version 4.1.4 up to and including 4.2.0 ### Patches This issue was introduced on 4.1.4 and patched on 4.2.1, user's should upgrade to 4.2.1 or newer versions.

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describes (1)

Related CVEs.

IDseverity exploitable
CVE-2024-27083USmedium6.1—
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…
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references

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