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TI-2023-01335 Aliases CVE-2023-1412

Local Privilege Escalation Vulnerability in WARP's MSI Installer

Priority LOW 36CWE-59Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

An unprivileged (non-admin) user can exploit an Improper Access Control vulnerability in the Cloudflare WARP Client for Windows (<= 2022.12.582.0) to perform privileged operations with SYSTEM context by working with a combination of opportunistic locks (oplock) and symbolic links (which can both be created by an unprivileged user). After installing the Cloudflare WARP Client (admin privileges required), an MSI-Installer is placed under C:\Windows\Installer. The vulnerability lies in the repair function of this MSI. ImpactAn unprivileged (non-admin) user can exploit this vulnerability to perform privileged operations with SYSTEM context, including deleting arbitrary files and reading arbitrary file content. This can lead to a variety of attacks, including the manipulation of system files and privilege escalation. PatchesA new installer with a fix that addresses this vulnerability was released in version 2023.3.381.0. While the WARP Client itself is not vulnerable (only the installer), users are encouraged to upgrade to the latest version and delete any older installers present in their systems.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00244 15th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

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
CloudflareWARPup to 2022.5.309.0—No fix listedCNA
  • WARP VendorCloudflare Affected up to 2022.5.309.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cloudflare:warp:*:*:*:*:*:windows:*:*before 2023.3.381.0VulnerableCloudflare
  • cpe:2.3:a:cloudflare:warp:*:*:*:*:*:windows:*:* Versions before 2023.3.381.0 Vulnerable ·Cloudflare

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-1412

References

Advisory 1

Other 2

  • TI-2022-04046 support_uri validation missing in WARP client for Windows CVSS 3.1HIGH 8.9
  • TI-2022-03068 Bypassing Cloudflare Zero Trust policies using warp-cli set-custom-endpoint command CVSS 3.1CRITICAL 9.8
  • TI-2023-01749 Remote access to warp-svc.exe in Cloudflare WARP CVSS 3.1HIGH 7.3
  • TI-2022-03240 Lock WARP switch bypass using warp-cli 'add-trusted-ssid' command CVSS 3.1HIGH 8.8
  • TI-2023-02579 Plaintext transmission of DNS requests in Windows 1.1.1.1 WARP client CVSS 3.1HIGH 7.4
  • TI-2023-00618 Local Privilege Escalation in Cloudflare WARP Installer (Windows) CVSS 3.1HIGH 7.8
See all 15 →

Sources

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