CVE-2024-27083: Flask-AppBuilder is an application development framework, built on top of Flask

Routine

MEDIUM 4.3UPGRADE

CVE-2024-27083 is a medium-severity flaw (CVSS 4.3) affecting flask-appbuilder. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-02-29
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: dpgaspar

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-02-29 01:44 UTCPublished CVE record published
2026-06-17 07:19 UTCUpdated Record last modified

dpgaspar flask-appbuilder UPGRADE

Affected: >= 4.1.4 and < 4.2.1

Fixed in: 4.2.1

Safe to downgrade to: a release before 4.1.4

1. Check installed version

apt-cache policy flask-appbuilder || rpm -q flask-appbuilder || flask-appbuilder --version

2. UPGRADE to 4.2.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade flask-appbuilder

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade flask-appbuilder

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 4.1.4 (Debian / Ubuntu)

apt-cache madison flask-appbuilder sudo apt install flask-appbuilder=<VERSION_BEFORE_4.1.4> sudo apt-mark hold flask-appbuilder

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list flask-appbuilder sudo dnf downgrade flask-appbuilder-<VERSION_BEFORE_4.1.4> sudo dnf versionlock add flask-appbuilder

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-27083?

flask-appbuilder: upgrade to 4.2.1. Exact commands for each OS are on this page.

Is CVE-2024-27083 being exploited?

CVE-2024-27083 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-27083 affect?

CVE-2024-27083 affects flask-appbuilder. Severity is medium (CVSS 4.3). 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

How urgent is CVE-2024-27083?

Priority 27/100. No elevated risk signals yet.

Software pages

Flask vulnerabilities

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References

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