Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 100.0%; technical severity is CVSS 9.8.
In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible
Who should care
- Teams operating Teamcity
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Teamcity is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Vendor remediation
Patch and remediation links
Use the vendor source below to confirm the correct fixed version, package or mitigation for your affected product.
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-288
- Affected versions
- Jetbrains Teamcity (End Excluding: 2023.05.4)
- Published
- 19 September 2023
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 100.0%
- Signal calculated at 88
External references
- Government advisory from www.cisa.gov
- Exploit information from packetstormsecurity.com
- Third-party advisory from attackerkb.com
- Vendor advisory from blog.jetbrains.com
- Vendor advisory from www.jetbrains.com
- Third-party advisory from www.rapid7.com
- Technical reference from www.securityweek.com
- Exploit information from www.sonarsource.com