External risk intelligence
Relay Server could allow external attackers to read or modify document contents
The Relay server could allow external attackers to read or modify document contents, potentially exposing sensitive files and customer data. Please apply the latest vendor update to protect your collaborative environment.
Halo Surface Signal
2/ 5The Relay server is a backend real-time collaboration synchronization tool for Obsidian. The bulletin explicitly states that these servers are typically intended for internal use, meaning direct public internet exposure is not the standard or designed deployment pattern, though they remain network-reachable within private infrastructure.
Exposure facts
H – Horizon Alert
A security vulnerability has been identified in Relay, the real-time collaboration tool used with Obsidian. This issue involves a flaw in how the system handles access requests, which may allow an unauthorized individual to connect to your document synchronization service without valid credentials. If a document ID is known or guessed, an attacker could view or modify sensitive document contents without proper authorization. This represents a potential risk to the confidentiality and integrity of information managed within your collaborative environment.
A – Asset Exposure
The Relay server, which facilitates real-time collaboration for Obsidian, contains a security vulnerability within its WebSocket communication endpoints. If accessed by an unauthorized party, this flaw could allow the unauthorized reading or modification of sensitive files and customer data stored in collaborative documents. While these servers are typically intended for internal use, any instance reachable over your network could be susceptible to this access.
L – Live Threat
This vulnerability involves an authentication bypass that could allow unauthorized individuals to access or modify document content if a specific document ID is known or guessed. Currently, the available context does not indicate active exploitation or observed targeting of this issue. Furthermore, there are no reports of public exploit code or proof-of-concept activity, suggesting that the immediate threat level is limited.
O – Operational Fix
To address this security risk, please apply the latest vendor update for the Relay Server as soon as possible. This update resolves an authentication flaw that could allow unauthorized access to your synchronized documents. If an immediate update is not feasible, we recommend reviewing your current network configurations to minimize exposure for these services until the update can be deployed.