CVE-2023-21777: microsoft azure_app_service_on_azure_stack Improper Access Control
CVSS: 8.7v3.1HighModified
Published 14-02-2023Last modified 19-08-2026
Vulnerability summary
CVE-2023-21777 is a high (CVSS 8.7) Improper Access Control vulnerability in microsoft azure_app_service_on_azure_stack. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 27.1% of scored vulnerabilities.
CVSS score
8.7/10
010
High · v3.1 (CVE.org)EPSS score
0.35%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 14-02-2023PublishedVulnerability first disclosed.
- 19-08-2026Last modifiedVulnerability information updated.
Description
Azure App Service on Azure Stack Hub Elevation of Privilege Vulnerability
CVSS metrics
2 scores · 2 sources · 1 versionHigh 8.7Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST8.7HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
EPSS trend
Probability
0.35%
Chance of exploitation in the next 30 days
Percentile
27%
Versus all other CVEs
30-day change
0.00 pp
From 0.35% on 21-09-2026
21-09-202621-10-2026
EPSS score0.35%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-284Improper Access ControlThe product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
- CWE-269Improper Privilege ManagementThe product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
Affected systems
Microsoft2 products
- azure_app_service_on_azure_stackna
- azure app service on azure stack hub≥ 98.0.0, < 98.0.1.703
1 vendor · 2 products
