How severe is CVE-2019-18365?

CVE-2019-18365 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2019-18365 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-18365?

CVE-2019-18365 affects Jetbrains Teamcity. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-18365?

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

When was CVE-2019-18365 published?

CVE-2019-18365 was published on 2019-10-31 and last updated on 2026-06-17.

CVE-2019-18365

CVE-2019-18365 is a medium-severity vulnerability in Jetbrains Teamcity with a CVSS 3.x base score of 4.3. 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-269.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.3
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-269
Affected product: Jetbrains Teamcity
Published: 2019-10-31
Last modified: 2026-06-17

Description

In JetBrains TeamCity before 2019.1.4, reverse tabnabbing was possible on several pages.

Frequently asked questions

What is CVE-2019-18365?: In JetBrains TeamCity before 2019.1.4, reverse tabnabbing was possible on several pages.
How severe is CVE-2019-18365?: CVE-2019-18365 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2019-18365 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-18365?: CVE-2019-18365 affects Jetbrains Teamcity. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-18365?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-18365 published?: CVE-2019-18365 was published on 2019-10-31 and last updated on 2026-06-17.

References

https://blog.jetbrains.com/blog/2019/10/29/jetbrains-security-bulletin-q3-2019/

Affected products (1)

cpe:2.3:a:jetbrains:teamcity:*:*:*:*:*:*:*:*

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