Azure App Service on Azure Stack Hub Elevation of Privilege Vulnerability

published 2023-02-14 3 y ago modified 2026-08-19 2 mo ago also EUVD-2023-25944

cvss: 8.7; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits: 0; none known

Patch / fix

fixed in 1 links 1

Microsoft Azure App Service on Azure Stack Hub 98.0.1.703

msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21777 advisory

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-05-30)

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.7	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L/E:U/RL:O/RC:C
CNA	3.1	8.7	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
NVD	3.1	8.7	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

Affected products

Microsoft Azure App Service on Azure Stack Hub

Classification

Weakness

CWE-284 Improper Access Control
CWE-269 Improper Privilege Management

References

msrc.microsoft.com /update-guide/vulnerability/CVE-2023-21777
vendor-advisory, patch, release-notes

Sources

CVE List CVE-2023-21777
NVD CVE-2023-21777

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary