How severe is CVE-2019-12843?

CVE-2019-12843 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2019-12843 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-12843?

CVE-2019-12843 affects Jetbrains Teamcity. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-12843?

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

When was CVE-2019-12843 published?

CVE-2019-12843 was published on 2019-07-03 and last updated on 2026-06-17.

CVE-2019-12843

CVE-2019-12843 is a medium-severity vulnerability in Jetbrains Teamcity with a CVSS 3.x base score of 6.1. 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-94.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Jetbrains Teamcity
Published: 2019-07-03
Last modified: 2026-06-17

Description

A possible stored JavaScript injection requiring a deliberate server administrator action was detected. The issue was fixed in JetBrains TeamCity 2018.2.3.

Frequently asked questions

What is CVE-2019-12843?: A possible stored JavaScript injection requiring a deliberate server administrator action was detected. The issue was fixed in JetBrains TeamCity 2018.2.3.
How severe is CVE-2019-12843?: CVE-2019-12843 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2019-12843 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-12843?: CVE-2019-12843 affects Jetbrains Teamcity. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-12843?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-12843 published?: CVE-2019-12843 was published on 2019-07-03 and last updated on 2026-06-17.

References

https://blog.jetbrains.com/blog/2019/06/19/jetbrains-security-bulletin-q1-2019/

Affected products (1)

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

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