How severe is CVE-2022-4428?

CVE-2022-4428 has a CVSS 3.x base score of 8.9, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2022-4428 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-4428?

CVE-2022-4428 affects Cloudflare Warp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-4428?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-4428 published?

CVE-2022-4428 was published on 2023-01-11 and last updated on 2026-06-17.

CVE-2022-4428

CVE-2022-4428 is a high-severity vulnerability in Cloudflare Warp with a CVSS 3.x base score of 8.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 8.9)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cloudflare Warp
Published: 2023-01-11
Last modified: 2026-06-17

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).

Frequently asked questions

What is CVE-2022-4428?: 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).
How severe is CVE-2022-4428?: CVE-2022-4428 has a CVSS 3.x base score of 8.9, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.
Is CVE-2022-4428 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-4428?: CVE-2022-4428 affects Cloudflare Warp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-4428?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-4428 published?: CVE-2022-4428 was published on 2023-01-11 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:cloudflare:warp:*:*:*:*:*:windows:*:*

More vulnerabilities in Cloudflare Warp

CVE-2022-2225 — High (CVSS 8.1): By using warp-cli subcommands (disable-ethernet, disable-wifi), it was possible for a user without admin privileges to…
CVE-2023-2754 — High (CVSS 7.4): The Cloudflare WARP client for Windows assigns loopback IPv4 addresses for the DNS Servers, since WARP acts as local…
CVE-2023-1862 — High (CVSS 7.3): Cloudflare WARP client for Windows (up to v2023.3.381.0) allowed a malicious actor to remotely access the…
CVE-2025-0651 — High (CVSS 7.1): Improper Privilege Management vulnerability in Cloudflare WARP on Windows allows File Manipulation. User with a low…
CVE-2023-0652 — High (CVSS 7.0): Due to a hardlink created in the ProgramData folder during the repair process of the software, the installer (MSI) of…
CVE-2023-1412 — High (CVSS 7.0): An unprivileged (non-admin) user can exploit an Improper Access Control vulnerability in the Cloudflare WARP Client for…

All CVEs affecting Cloudflare Warp →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →