What’s Vulnerable › Vulnerabilities

CVE-2023-0652: Local Privilege Escalation in Cloudflare WARP Installer (Windows)

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-04-06 · updated 2026-06-17
• Weakness: CWE-59

Description

Due to a hardlink created in the ProgramData folder during the repair process of the software, the installer (MSI) of WARP Client for Windows (<= 2022.12.582.0) allowed a malicious attacker to forge the destination of the hardlink and escalate privileges, overwriting SYSTEM protected files. As Cloudflare WARP client for Windows (up to version 2022.5.309.0) allowed creation of mount points from its ProgramData folder, during installation of the WARP client, it was possible to escalate privileges and overwrite SYSTEM protected files.

Affected products

• Cloudflare WARP: before 2023.3.381.0 — fixed in 2023.3.381.0

How to fix

Upgrade to a fixed version: Cloudflare WARP 2023.3.381.0. Check the vendor advisory for mitigations.

References

• https://developers.cloudflare.com/warp-client/get-started/windows/
• https://github.com/cloudflare/advisories/security/advisories/GHSA-xmhj-9p83-xvw9
• https://install.appcenter.ms/orgs/cloudflare/apps/1.1.1.1-windows-1/distribution_groups/release
• https://developers.cloudflare.com/warp-client/get-started/windows/
• https://github.com/cloudflare/advisories/security/advisories/GHSA-xmhj-9p83-xvw9
• https://install.appcenter.ms/orgs/cloudflare/apps/1.1.1.1-windows-1/distribution_groups/release

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