8.8

CVE-2021-41265: dpgaspar flask-appbuilder Improper Authentication

CVSS: 8.8v3.1HighModified
AliasesGHSA-m3rf-7m4w-r66qPYSEC-2021-851
Published 09-12-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-41265 is a high (CVSS 8.8) Improper Authentication vulnerability in dpgaspar flask-appbuilder. EPSS estimates a 1.32% chance of exploitation in the next 30 days, higher than 70.3% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
1.32%
0%100%
Low · +0.07 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 09-12-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

Flask-AppBuilder is a development framework built on top of Flask. Verions prior to 3.3.4 contain an improper authentication vulnerability in the REST API. The issue allows for a malicious actor with a carefully crafted request to successfully authenticate and gain access to existing protected REST API endpoints. This only affects non database authentication types and new REST API endpoints. Users should upgrade to Flask-AppBuilder 3.3.4 to receive a patch.

CVSS metrics

5 scores · 3 sources · 3 versions

EPSS trend

Probability

1.32%

Chance of exploitation in the next 30 days

Percentile

70%

Versus all other CVEs

30-day change

+0.07 pp

From 1.25% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.32%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Dpgaspar1 product
PyPI1 product
  • flask-appbuilder< eba517aab121afa3f3f2edb011ec6bc4efd61fbc | < 3.3.4

2 vendors · 2 products

References

6 links