CVE-2018-9148

CRITICAL

Western Digital My Cloud Firmware v04.05.00-320 - Authentication Bypass via Session Token in Filename

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-9148. PoCs published by Sven Fassbender.

AI-analyzed exploit summary This exploit demonstrates a directory traversal vulnerability in TwonkyMedia Server versions 7.0.11-8.5. It allows an attacker to set the 'contentbase' parameter to '/../' via the 'rpc/set_all' endpoint, enabling unauthorized filesystem browsing outside user-specified shares.

Description

Western Digital WD My Cloud v04.05.00-320 devices embed the session token (aka PHPSESSID) in filenames, which makes it easier for attackers to bypass authentication by listing a directory. NOTE: this can be exploited in conjunction with CVE-2018-7171 for remote authentication bypass within a product that uses My Cloud.

Exploits (1)

exploitdb WORKING POC
by Sven Fassbender · pythonwebappsmultiple
https://www.exploit-db.com/exploits/44350

This exploit demonstrates a directory traversal vulnerability in TwonkyMedia Server versions 7.0.11-8.5. It allows an attacker to set the 'contentbase' parameter to '/../' via the 'rpc/set_all' endpoint, enabling unauthorized filesystem browsing outside user-specified shares.

Classification
Working Poc 95%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: TwonkyMedia Server 7.0.11-8.5
No auth needed
Prerequisites: Network access to the TwonkyMedia Server on port 9000
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (1)

Core 1
Core References
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://exploit-db.com/exploits/44350/

Scores

CVSS v3 9.8
EPSS 0.0379
EPSS Percentile 88.6%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-287
Status published
Products (1)
westerndigital/my_cloud_firmware 04.05.00-320
Published Mar 30, 2018
Tracked Since Feb 18, 2026