How severe is CVE-2023-42793?

CVE-2023-42793 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-2023-42793 being actively exploited?

Yes. CVE-2023-42793 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-10-04, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2023-42793?

CVE-2023-42793 affects Jetbrains Teamcity. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-42793?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2023-42793 have an EU (EUVD) identifier?

Yes. CVE-2023-42793 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-47222. It is also flagged as exploited in the EUVD (since 2023-10-04).

When was CVE-2023-42793 published?

CVE-2023-42793 was published on 2023-09-19 and last updated on 2026-06-17.

CVE-2023-42793

CVE-2023-42793 is a critical-severity vulnerability in Jetbrains Teamcity with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2023-10-04). The underlying weakness is classified as CWE-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 100% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2023-10-04)
EU (EUVD) id: EUVD-2023-47222
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2023-10-04)
Weakness: CWE-306
Affected product: Jetbrains Teamcity
Published: 2023-09-19
Last modified: 2026-06-17

Description

In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible

Frequently asked questions

What is CVE-2023-42793?: In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible
How severe is CVE-2023-42793?: CVE-2023-42793 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-2023-42793 being actively exploited?: Yes. CVE-2023-42793 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-10-04, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2023-42793?: CVE-2023-42793 affects Jetbrains Teamcity. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-42793?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2023-42793 have an EU (EUVD) identifier?: Yes. CVE-2023-42793 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-47222. It is also flagged as exploited in the EUVD (since 2023-10-04).
When was CVE-2023-42793 published?: CVE-2023-42793 was published on 2023-09-19 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Jetbrains Teamcity

CVE-2026-63077 — Critical (CVSS 9.8): In JetBrains TeamCity before 2026.1.3, 2025.11.7 unauthenticated remote code execution was possible via the agent…
CVE-2024-27198 — Critical (CVSS 9.8): In JetBrains TeamCity before 2023.11.4 authentication bypass allowing to perform admin actions was possible
CVE-2024-23917 — Critical (CVSS 9.8): In JetBrains TeamCity before 2023.11.3 authentication bypass leading to RCE was possible
CVE-2022-25263 — Critical (CVSS 9.8): JetBrains TeamCity before 2021.2.3 was vulnerable to OS command injection in the Agent Push feature configuration.
CVE-2022-24340 — Critical (CVSS 9.8): In JetBrains TeamCity before 2021.2.1, XXE during the parsing of the configuration file was possible.
CVE-2022-24331 — Critical (CVSS 9.8): In JetBrains TeamCity before 2021.1.4, GitLab authentication impersonation was possible.

All CVEs affecting Jetbrains Teamcity →

Other CWE-306 (Missing Authentication for Critical Function) vulnerabilities

CVE-2026-20357 — Critical (CVSS 10.0): As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Crosswork engineering team…
CVE-2026-58115 — Critical (CVSS 10.0): A vulnerability has been identified in SIMATIC IoT2050 Advanced (6ES7647-0BA00-1YA2) (All versions < V4.3.4.1 running…
CVE-2026-63508 — Critical (CVSS 10.0): Missing authentication for critical function in Microsoft Planetary Computer Pro allows an unauthorized attacker to…
CVE-2026-56163 — Critical (CVSS 10.0): Missing authentication for critical function in Microsoft Azure Kubernetes Service allows an unauthorized attacker to…
CVE-2026-64812 — Critical (CVSS 10.0): In JetBrains IntelliJ IDEA before 2026.2 unauthorized input injection was possible in a Remote Development session
CVE-2026-60644 — Critical (CVSS 10.0): Vulnerability in the Oracle WebCenter Content product of Oracle Fusion Middleware (component: Web Content Management).…

Browse all CWE-306 (Missing Authentication for Critical Function) vulnerabilities →