CVE-2022-21659 json
Observable Response Discrepancy in Flask-AppBuilder
published 2022-01-31 4 y ago modified 2026-09-10 1 mo ago also GHSA-wfjw-w6pv-8p7f , PYSEC-2022-24 , EUVD-2022-0103
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 61%
- public exploits
- 0
- none known
Summary
Flask-AppBuilder is an application development framework, built on top of the Flask web framework. In affected versions there exists a user enumeration vulnerability. This vulnerability allows for a non authenticated user to enumerate existing accounts by timing the response time from the server when you are logging in. Users are advised to upgrade to version 3.4.4 as soon as possible. There are no known workarounds for this issue.
Patch / fix
- pypi flask-appbuilder 3.4.2, 3.4.4
- dpgaspar flask-appbuilder 3.4.2
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 18 mo ago
Exploit prediction
0.95% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
| GitHub | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | flask-appbuilder | <3.4.4 <3.4.2 |
3.4.4 3.4.2 |
Classification
References
-
github.com
/dpgaspar/Flask-AppBuilder/pull/1775
web, patch, third-party-advisory
-
github.com
/dpgaspar/Flask-AppBuilder/commit/e2b744c258ff62ece9d5ac7172c3b4644ff4c2fe
web
-
github.com
/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-wfjw-w6pv-8p7f
web, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2022-21659
advisory
-
github.com
/dpgaspar/Flask-AppBuilder
package
-
github.com
/dpgaspar/Flask-AppBuilder/commits/v3.4.4
web
-
github.com
/pypa/advisory-database/tree/main/vulns/flask-appbuilder/PYSEC-2022-24.yaml
web
Sources
- CVE List CVE-2022-21659
- GitHub Advisory GHSA-wfjw-w6pv-8p7f
- NVD CVE-2022-21659
- OSV PYSEC-2022-24
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.