CVE-2022-4428: support_uri validation missing in WARP client for Windows

Severity: high (CVSS 8.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-01-11 · updated 2026-06-17
Weakness: CWE-20

Description

support_uri parameter in the WARP client local settings file (mdm.xml) lacked proper validation which allowed for privilege escalation and launching an arbitrary executable on the local machine upon clicking on the "Send feedback" option. An attacker with access to the local file system could use a crafted XML config file pointing to a malicious file or set a local path to the executable using Cloudflare Zero Trust Dashboard (for Zero Trust enrolled clients).

Affected products

Cloudflare WARP: through 2022.10.106.0

References

https://github.com/cloudflare/advisories/security/advisories/GHSA-h3j3-fhqg-66rh
https://github.com/cloudflare/advisories/security/advisories/GHSA-h3j3-fhqg-66rh

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