CVE-2022-22999: Cross-site Scripting Vulnerability in USB Backups App

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-07-25 · updated 2026-06-17
Weakness: CWE-79

Description

Western Digital My Cloud devices are vulnerable to a cross side scripting vulnerability that can allow a malicious user with elevated privileges access to drives being backed up to construct and inject JavaScript payloads into an authenticated user's browser. As a result, it may be possible to gain control over the authenticated session, steal data, modify settings, or redirect the user to malicious websites. The scope of impact can extend to other components.

Affected products

Westerndigital My Cloud Dl2100 Firmware: before 5.23.114 — fixed in 5.23.114
Westerndigital My Cloud Dl4100 Firmware: before 5.23.114 — fixed in 5.23.114
Westerndigital My Cloud Ex2100 Firmware: before 5.23.114 — fixed in 5.23.114
Westerndigital My Cloud Ex2 Ultra Firmware: before 5.23.114 — fixed in 5.23.114
Westerndigital My Cloud Ex4100 Firmware: before 5.23.114 — fixed in 5.23.114
Westerndigital My Cloud Mirror G2 Firmware: before 5.23.114 — fixed in 5.23.114
Westerndigital My Cloud Pr2100 Firmware: before 5.23.114 — fixed in 5.23.114
Westerndigital My Cloud Pr4100 Firmware: before 5.23.114 — fixed in 5.23.114

How to fix

Upgrade to a fixed version: Westerndigital My Cloud Dl2100 Firmware 5.23.114; Westerndigital My Cloud Dl4100 Firmware 5.23.114; Westerndigital My Cloud Ex2100 Firmware 5.23.114; Westerndigital My Cloud Ex2 Ultra Firmware 5.23.114; Westerndigital My Cloud Ex4100 Firmware 5.23.114; Westerndigital My Cloud Mirror G2 Firmware 5.23.114; Westerndigital My Cloud Pr2100 Firmware 5.23.114; Westerndigital My Cloud Pr4100 Firmware 5.23.114. Check the vendor advisory for mitigations.

References

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