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Fencer Vulns
low 2.7

CVE-2023-34110 json

Flask-AppBuilder vulnerable to possible disclosure of sensitive information on user error

published 2023-06-22 3 y ago modified 2026-06-17 4 mo ago also GHSA-jhpr-j7cq-3jp3 , PYSEC-2023-94 , EUVD-2023-0078

cvss
2.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

Flask-AppBuilder is an application development framework, built on top of Flask. Prior to version 4.3.2, an authenticated malicious actor with Admin privileges, could by adding a special character on the add, edit User forms trigger a database error, this error is surfaced back to this actor on the UI. On certain database engines this error can include the entire user row including the pbkdf2:sha256 hashed password. This vulnerability has been fixed in version 4.3.2.

Patch / fix

  • pypi flask-appbuilder 4.3.2
  • flask-appbuilder_project flask-appbuilder 4.3.2

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
23 mo ago

Exploit prediction

0.68% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 2.7 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
NVD 3.1 2.7 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
GitHub 3.1 2.7 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
pypi flask-appbuilder
<4.3.2
4.3.2

Affected products

  • dpgaspar Flask-AppBuilder

Classification

Weakness
  • CWE-209 Generation of Error Message Containing Sensitive Information

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.