Azure
CVE-2020-16904 — Azure Functions Elevation of Privilege Vulnerability
Executive Summary
An elevation of privilege vulnerability exists in the way Azure Functions validate access keys. An unauthenticated attacker who successfully exploited this vulnerability could invoke an HTTP Function without proper authorization. This security update addresses the vulnerability by correctly validating access keys used to access HTTP Functions.
Overview
5.3
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
Temporal Score: 4.8
EPSS Score
0.03123
probability of exploitation in the next 30 days
0.86163 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
1 affected product
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Azure Functions | — |
Important | Elevation of Privilege | Unknown |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
— |
Unknown |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
James Hardaker
References
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