CVE-2021-29621

Observable Response Discrepancy in Flask-AppBuilder

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Flask-AppBuilder is a development framework, built on top of Flask. User enumeration in database authentication in Flask-AppBuilder <= 3.2.3. Allows for a non authenticated user to enumerate existing accounts by timing the response time from the server when you are logging in. Upgrade to version 3.3.0 or higher to resolve.

Flask-AppBuilder es un marco de desarrollo, construido sobre Flask. Enumeración de usuarios en la autenticación de la base de datos en Flask-AppBuilder versiones anteriores a 3.2.3 incluyéndola. Permite a un usuario no autenticado enumerar las cuentas existentes cronometrando el tiempo de respuesta del servidor cuando está iniciando la sesión. Actualice a la versión 3.3.0 o superior para resolverlo

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-03-30 CVE Reserved
2021-06-07 CVE Published
2024-08-03 CVE Updated
2024-08-08 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-203: Observable Discrepancy

CAPEC

References (6)

URL	Tag	Source
https://github.com/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-434h-p4gx-jm89	Third Party Advisory
https://lists.apache.org/thread.html/r466759f377651f0a690475d5a52564d0e786e82c08d5a5730a4f8352%40%3Cannounce.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r5b754118ba4e996adf03863705d34168bffec202da5c6bdc9bf3add5%40%3Cannounce.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r91067f953906d93aaa1c69fe2b5472754019cc6bd4f1ba81349d62a0%40%3Ccommits.airflow.apache.org%3E	Mailing List
https://pypi.org/project/Flask-AppBuilder	Product

URL	Date	SRC

URL	Date	SRC
https://github.com/dpgaspar/Flask-AppBuilder/commit/780bd0e8fbf2d36ada52edb769477e0a4edae580	2023-11-07

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Flask-appbuilder Project Search vendor "Flask-appbuilder Project"		Flask-appbuilder Search vendor "Flask-appbuilder Project" for product "Flask-appbuilder"				<= 3.2.3 Search vendor "Flask-appbuilder Project" for product "Flask-appbuilder" and version " <= 3.2.3"		-		Affected
Apache Search vendor "Apache"		Airflow Search vendor "Apache" for product "Airflow"				1.10.0 Search vendor "Apache" for product "Airflow" and version "1.10.0"		-		Affected