Open Redirect in Flask-AppBuilder

Description

Flask-AppBuilder is an application development framework built on top of Flask. Versions prior to 3.4.5 contain an open redirect vulnerability when using the database authentication login page. There are no known workarounds. Users are recommended to upgrade to version 3.4.5 or later.

For more information

If you have any questions or comments about this advisory:
* Open an issue in Flask-AppBuilder

Basic information

Type
reviewed
Severity
medium
Advisory on GitHub
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Repository advisory
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Source code
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Published (advisory)
2022-03-25 19:27:39 UTC
Updated
2023-01-27 05:01:02 UTC
GitHub reviewed
2022-03-25 19:27:39 UTC
NVD published
2022-03-24

EPSS Score

Score Percentile
0.35% 56.60%

CVSS Scores

Base score Version Severity Vector
6.1 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.

Identifiers

CWEs

CWE id Name
CWE-601 URL Redirection to Untrusted Site ('Open Redirect')

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
pip Flask-AppBuilder < 3.4.5 3.4.5

References

cvelogic Threat Intelligence