Back to Database
Status published
Medium
CVE-2023-28807
Bypass of ZIA domain fronting detection module through evasion technique
Vulnerability Description
In Zscaler Internet Access (ZIA) a mismatch between Connect Host and Client Hello's Server Name Indication (SNI) enables attackers to evade network security controls by hiding their communications within legitimate traffic.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
THREAT MONITOR
Am I Vulnerable?
Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2023-28807
Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Citi Red Team
References
More from Zscaler
View All →CVE-2025-54983
Health check port on ZCC allows tunnel bypass
Medium
5.2
CVE-2025-54982
SAML 2.0 Public Key Validation Issue
Critical
9.6
CVE-2024-31127
MacOS Zscaler Client Connector Local Privilege Escalation
High
7.3
CVE-2024-23483
Local Privilege Escalation via lack of input validation
High
7
CVE-2024-23482
ZScalerService Local Privilege Escalation
High
7
Affected Vendor
Zscaler
View all reports →Affected Software
ZIA
Vulnerable Versions:
0
Timeline
Official Publish:
January 31st, 2024
Last Modified:
June 17th, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N