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TI-2023-13310 Aliases CVE-2023-28800GHSA-crh5-rq78-8m4h

Output encoding missing in redrurl parameter

Priority LOW 38CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

When using local accounts for administration, the redirect url parameter was not encoded correctly, allowing for an XSS attack providing admin login.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00548 46th percentileScored 2026-11-07
Fix Fixed Client Connector (Zscaler): 3.9 Mac, 3.7 Win, 1.9.3 iOS +3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ZscalerClient Connectorbefore 3.9 Mac, 3.7 Win, 1.9.3 iOS, 1.10.2 Android, 1.10.1 Chrome OS, 1.4 Linux3.9 Mac, 3.7 Win, 1.9.3 iOS, 1.10.2 Android, 1.10.1 Chrome OS, 1.4 LinuxPatch availableCNA
  • Client Connector VendorZscaler Affected before 3.9 Mac, 3.7 Win, 1.9.3 iOS, 1.10.2 Android, 1.10.1 Chrome OS, 1.4 Linux Fixed in 3.9 Mac, 3.7 Win, 1.9.3 iOS, 1.10.2 Android, 1.10.1 Chrome OS, 1.4 Linux Patch available CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:linux:*:*before 1.4VulnerableZscaler
cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:iphone_os:*:*before 1.9.3VulnerableZscaler
cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:chrome_os:*:*before 1.10.1VulnerableZscaler
cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:android:*:*before 1.10.2VulnerableZscaler
cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:windows:*:*before 3.7VulnerableZscaler
cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:macos:*:*before 3.9VulnerableZscaler
  • cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:linux:*:* Versions before 1.4 Vulnerable ·Zscaler
  • cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:iphone_os:*:* Versions before 1.9.3 Vulnerable ·Zscaler
  • cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:chrome_os:*:* Versions before 1.10.1 Vulnerable ·Zscaler
  • cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:android:*:* Versions before 1.10.2 Vulnerable ·Zscaler
  • cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:windows:*:* Versions before 3.7 Vulnerable ·Zscaler
  • cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:macos:*:* Versions before 3.9 Vulnerable ·Zscaler

Remediation

  • Fix · CNA Client Connector (Zscaler) Fixed in 3.9 Mac, 3.7 Win, 1.9.3 iOS, 1.10.2 Android, 1.10.1 Chrome OS, 1.4 Linux

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Zscaler Client Connector 3.9 Mac, 3.7 Win, 1.9.3 iOS, 1.10.2 Android, 1.10.1 Chrome OS, 1.4 Linux

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2023-13309 Open redirect in Zscaler Client ConnectorPriority LOW 38
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-28800
  2. 2026-10-03 Alias added: GHSA-crh5-rq78-8m4h

References

Other 6

  • TI-2020-09334 The Zscaler Client Connector for Windows prior to 2.1.2.74 had a stack based buffer… CVSS 3.1CRITICAL 9.8
  • TI-2024-15528 Local Privilege Escalation via lack of input validation CVSS 3.1CRITICAL 9.8
  • TI-2024-15526 Insecure MacOS code sign check fallback CVSS 3.1CRITICAL 9.8
  • TI-2024-15505 Multiple Arbitrary Creates/Overwrites by link following CVSS 3.1CRITICAL 9.8
  • TI-2023-13308 Out-of-bounds write to heap in pacparser CVSS 3.1CRITICAL 9.8
  • TI-2023-13315 ZCC on Linux privilege escalation CVSS 3.1CRITICAL 9.8
See all 40 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences