How severe is CVE-2021-43183?

CVE-2021-43183 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-43183 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43183?

CVE-2021-43183 affects Jetbrains Hub. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43183?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-43183 published?

CVE-2021-43183 was published on 2021-11-09 and last updated on 2026-06-17.

CVE-2021-43183

CVE-2021-43183 is a critical-severity vulnerability in Jetbrains Hub with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Jetbrains Hub
Published: 2021-11-09
Last modified: 2026-06-17

Description

In JetBrains Hub before 2021.1.13690, the authentication throttling mechanism could be bypassed.

Frequently asked questions

What is CVE-2021-43183?: In JetBrains Hub before 2021.1.13690, the authentication throttling mechanism could be bypassed.
How severe is CVE-2021-43183?: CVE-2021-43183 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-43183 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43183?: CVE-2021-43183 affects Jetbrains Hub. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43183?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-43183 published?: CVE-2021-43183 was published on 2021-11-09 and last updated on 2026-06-17.

References

https://blog.jetbrains.com/blog/2021/11/08/jetbrains-security-bulletin-q3-2021/

Affected products (1)

cpe:2.3:a:jetbrains:hub:*:*:*:*:*:*:*:*

More vulnerabilities in Jetbrains Hub

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CVE-2026-25848 — Critical (CVSS 9.1): In JetBrains Hub before 2025.3.119807 authentication bypass allowing administrative actions was possible

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