Executive Summary

CVE-2026-4982 is a high-severity vulnerability in the Venueless platform that affects versions prior to a specific commit. It allows a user who has the "update world" permission in any Venueless world to exfiltrate chat messages from direct messages or channels in other worlds on the same server.

This happens because of a bug in the reporting feature that improperly validates input, specifically the internal channel UUID. This flaw enables unauthorized access to chat contents across different worlds on the server.

The exploitability is limited since the attacker must know the internal UUID of the target chat channel, which is unlikely to be obtained by outside attackers, especially for direct messages.

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Impact Analysis

This vulnerability primarily impacts the confidentiality of chat messages within the Venueless platform. A user with certain privileges can access and exfiltrate private chat messages from other worlds on the same server.

While the initial impact is on confidentiality, subsequent impacts can affect integrity and availability of the system as well.

The attack requires low privileges and no user interaction, making it easier for an attacker with the required permission to exploit.

No workarounds exist other than restricting privileged permissions or applying patches that fix the vulnerability.

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Mitigation Strategies

To mitigate this vulnerability, you should restrict the "update world" permission to only trusted users, as the exploit requires this privilege.

Additionally, apply the fix by updating Venueless to a version that includes the commit after e20083a where this issue is resolved.

No other workarounds exist besides limiting privileged access and patching the software.

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Compliance Impact

CVE-2026-4982 allows a user with certain privileges to exfiltrate chat messages from direct messages or channels in other worlds on the same server, leading to a significant confidentiality breach.

This unauthorized access to potentially sensitive communication data could impact compliance with data protection regulations such as GDPR and HIPAA, which require strict controls on the confidentiality and privacy of personal and health-related information.

Since the vulnerability enables exposure of private messages, organizations using the affected Venueless platform might face risks of non-compliance due to data leakage, unless they apply patches or restrict privileged permissions.

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Detection Guidance

Detection of CVE-2026-4982 involves monitoring for unauthorized access attempts to chat messages across different worlds on the Venueless platform, especially by users with the "update world" permission.

Since the exploit requires knowledge of internal channel UUIDs and involves the reporting feature, detection can focus on unusual or unauthorized use of the reporting functionality or access patterns involving multiple worlds' chat channels.

No specific detection commands are provided in the available resources. However, general approaches could include:

• Reviewing application logs for access to the reporting feature by users with "update world" permission.
• Monitoring network traffic for suspicious API calls or requests containing internal channel UUIDs that cross world boundaries.
• Using log analysis tools or SIEM solutions to flag unusual patterns of chat message access or export.

Since no direct commands or detection scripts are mentioned in the resources, it is recommended to implement logging and monitoring around the reporting feature and privilege usage.

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