CVE-2023-22817: Server-side Request Forgery vulnerability in Western Digital My Cloud, My Cloud Home and SanDisk ibi products

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-02-05 · updated 2026-06-17
Weakness: CWE-918

Description

Server-side request forgery (SSRF) vulnerability that could allow a rogue server on the local network to modify its URL using another DNS address to point back to the loopback adapter. This could then allow the URL to exploit other vulnerabilities on the local server. This was addressed by fixing DNS addresses that refer to loopback. This issue affects My Cloud OS 5 devices before 5.27.161, My Cloud Home, My Cloud Home Duo and SanDisk ibi devices before 9.5.1-104.

Affected products

Westerndigital My Cloud Dl2100 Firmware: before 5.27.161 — fixed in 5.27.161
Westerndigital My Cloud Dl4100 Firmware: before 5.27.161 — fixed in 5.27.161
Westerndigital My Cloud Ex2100 Firmware: before 5.27.161 — fixed in 5.27.161
Westerndigital My Cloud Ex2 Ultra Firmware: before 5.27.161 — fixed in 5.27.161
Westerndigital My Cloud Ex4100 Firmware: before 5.27.161 — fixed in 5.27.161
Westerndigital My Cloud Glacier Firmware: before 5.27.161 — fixed in 5.27.161
Westerndigital My Cloud Home Duo Firmware: before 9.5.1-104 — fixed in 9.5.1-104
Westerndigital My Cloud Home Firmware: before 9.5.1-104 — fixed in 9.5.1-104
Westerndigital My Cloud Mirror G2 Firmware: before 5.27.161 — fixed in 5.27.161
Westerndigital My Cloud Pr2100 Firmware: before 5.27.161 — fixed in 5.27.161
Westerndigital My Cloud Pr4100 Firmware: before 5.27.161 — fixed in 5.27.161
Westerndigital Sandisk Ibi Firmware: before 9.5.1-104 — fixed in 9.5.1-104
Westerndigital Wd Cloud Firmware: before 5.27.161 — fixed in 5.27.161

How to fix

Upgrade to a fixed version: Westerndigital My Cloud Dl2100 Firmware 5.27.161; Westerndigital My Cloud Dl4100 Firmware 5.27.161; Westerndigital My Cloud Ex2100 Firmware 5.27.161; Westerndigital My Cloud Ex2 Ultra Firmware 5.27.161; Westerndigital My Cloud Ex4100 Firmware 5.27.161; Westerndigital My Cloud Glacier Firmware 5.27.161; Westerndigital My Cloud Home Duo Firmware 9.5.1-104; Westerndigital My Cloud Home Firmware 9.5.1-104; Westerndigital My Cloud Mirror G2 Firmware 5.27.161; Westerndigital My Cloud Pr2100 Firmware 5.27.161; Westerndigital My Cloud Pr4100 Firmware 5.27.161; Westerndigital Sandisk Ibi Firmware 9.5.1-104. Check the vendor advisory for mitigations.

References

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