How severe is CVE-2021-43191?

CVE-2021-43191 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 none, integrity low, and availability none.

Is CVE-2021-43191 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43191?

CVE-2021-43191 affects Jetbrains Youtrack Mobile. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43191?

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

When was CVE-2021-43191 published?

CVE-2021-43191 was published on 2021-11-09 and last updated on 2026-06-17.

CVE-2021-43191

CVE-2021-43191 is a medium-severity vulnerability in Jetbrains Youtrack Mobile 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.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Jetbrains Youtrack Mobile
Published: 2021-11-09
Last modified: 2026-06-17

Description

JetBrains YouTrack Mobile before 2021.2, is missing the security screen on Android and iOS.

Frequently asked questions

What is CVE-2021-43191?: JetBrains YouTrack Mobile before 2021.2, is missing the security screen on Android and iOS.
How severe is CVE-2021-43191?: CVE-2021-43191 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 none, integrity low, and availability none.
Is CVE-2021-43191 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43191?: CVE-2021-43191 affects Jetbrains Youtrack Mobile. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43191?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-43191 published?: CVE-2021-43191 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:youtrack_mobile:*:*:*:*:*:*:*:*

More vulnerabilities in Jetbrains Youtrack Mobile

CVE-2021-43189 — High (CVSS 7.3): In JetBrains YouTrack Mobile before 2021.2, access token protection on Android is incomplete.
CVE-2021-43188 — High (CVSS 7.3): In JetBrains YouTrack Mobile before 2021.2, access token protection on iOS is incomplete.
CVE-2021-43192 — Medium (CVSS 5.3): In JetBrains YouTrack Mobile before 2021.2, iOS URL scheme hijacking is possible.
CVE-2021-43190 — Medium (CVSS 5.3): In JetBrains YouTrack Mobile before 2021.2, task hijacking on Android is possible.
CVE-2021-43187 — Medium (CVSS 5.3): In JetBrains YouTrack Mobile before 2021.2, the client-side cache on iOS could contain sensitive information.

All CVEs affecting Jetbrains Youtrack Mobile →