CVE-2023-34225
Published: 31 May 2023
Summary
CVE-2023-34225 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Jetbrains Teamcity. Its CVSS base score is 4.6 (Medium).
Operationally, ranked in the top 29.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
In JetBrains TeamCity versions prior to 2023.05, a stored cross-site scripting vulnerability (CWE-79) existed in the NuGet feed page. The flaw carried a CVSS 3.1 score of 4.6 with network attack vector, low complexity, low-privileged authentication, and required user interaction, resulting in limited impacts to confidentiality and integrity.
An authenticated attacker with the ability to influence NuGet feed content could store a malicious script that executes in the browsers of other users who view the page, enabling limited data exposure or unauthorized actions within the TeamCity application.
JetBrains addressed the issue in the 2023.05 release, as noted in their published security advisories. The associated EPSS score rose materially from a low baseline to a peak of 0.0605 on 2025-12-11 before receding, indicating that exploitation interest developed after public disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-38322
Vulnerability details
In JetBrains TeamCity before 2023.05 stored XSS in the NuGet feed page was possible
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.
Validates web inputs to reject script-related content that could produce XSS.
Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.