How severe is CVE-2022-21659?

CVE-2022-21659 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2022-21659 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-21659?

CVE-2022-21659 affects Dpgaspar Flask-appbuilder. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-21659?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-21659 published?

CVE-2022-21659 was published on 2022-01-31 and last updated on 2026-06-17.

CVE-2022-21659

CVE-2022-21659 is a medium-severity vulnerability in Dpgaspar Flask-appbuilder with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-203.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-203
Affected product: Dpgaspar Flask-appbuilder
Published: 2022-01-31
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2022-21659?: 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.
How severe is CVE-2022-21659?: CVE-2022-21659 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2022-21659 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-21659?: CVE-2022-21659 affects Dpgaspar Flask-appbuilder. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-21659?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-21659 published?: CVE-2022-21659 was published on 2022-01-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:dpgaspar:flask-appbuilder:*:*:*:*:*:*:*:*

More vulnerabilities in Dpgaspar Flask-appbuilder

CVE-2024-25128 — Critical (CVSS 9.1): Flask-AppBuilder is an application development framework, built on top of Flask. When Flask-AppBuilder is set to…
CVE-2021-41265 — High (CVSS 8.1): Flask-AppBuilder is a development framework built on top of Flask. Verions prior to 3.3.4 contain an improper…
CVE-2023-29005 — High (CVSS 7.5): Flask-AppBuilder versions before 4.3.0 lack rate limiting which can allow an attacker to brute-force user credentials.…
CVE-2021-32805 — High (CVSS 7.2): Flask-AppBuilder is an application development framework, built on top of Flask. In affected versions if using…
CVE-2025-58065 — Medium (CVSS 6.5): Flask-AppBuilder is an application development framework. Prior to version 4.8.1, when Flask-AppBuilder is configured…
CVE-2022-24776 — Medium (CVSS 6.1): Flask-AppBuilder is an application development framework, built on top of the Flask web framework. Flask-AppBuilder…

All CVEs affecting Dpgaspar Flask-appbuilder →

Other CWE-203 (Observable Discrepancy) vulnerabilities

CVE-2019-25337 — Critical (CVSS 9.8): OwnCloud 8.1.8 contains a username enumeration vulnerability that allows remote attackers to discover user accounts by…
CVE-2026-23519 — Critical (CVSS 9.8): RustCrypto CMOV provides conditional move CPU intrinsics which are guaranteed on major platforms to execute in…
CVE-2025-27667 — Critical (CVSS 9.8): Vasion Print (formerly PrinterLogic) before Virtual Appliance Host 22.0.843 Application 20.0.1923 allows Administrative…
CVE-2024-25714 — Critical (CVSS 9.8): In Rhonabwy through 1.1.13, HMAC signature verification uses a strcmp function that is vulnerable to side-channel…
CVE-2024-25191 — Critical (CVSS 9.8): php-jwt 1.0.0 uses strcmp (which is not constant time) to verify authentication, which makes it easier to bypass…
CVE-2024-25190 — Critical (CVSS 9.8): l8w8jwt 2.2.1 uses memcmp (which is not constant time) to verify authentication, which makes it easier to bypass…

Browse all CWE-203 (Observable Discrepancy) vulnerabilities →