CVE-2023-21565
Published: 14 June 2023
Summary
CVE-2023-21565 is a high-severity Cross-site Scripting (CWE-79) vulnerability in Microsoft Azure Devops Server. Its CVSS base score is 7.1 (High).
Operationally, ranked in the top 16.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2023-21565 is a spoofing vulnerability affecting Azure DevOps Server, assigned a CVSS 3.1 base score of 7.1 and linked to CWE-79. The flaw permits an attacker to present falsified content or data within the affected server environment through network-accessible vectors.
An authenticated user with low privileges can exploit the issue without user interaction, resulting in high impact to confidentiality and limited impact to integrity. This enables the attacker to spoof information visible to other users or obtain unauthorized access to sensitive data stored or processed by the server.
Microsoft security advisories at the referenced update guide URLs describe available patches and remediation steps for the affected Azure DevOps Server versions. The associated EPSS score rose from a low baseline to a peak of 0.0762 in January 2025 before receding to the current value of 0.0185, indicating a temporary increase in observed exploitation interest after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-25732
Vulnerability details
Azure DevOps Server Spoofing Vulnerability
- 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.