CVE-2025-66911Public exploitNetwork attack vector

Authenticated user-status disclosure via unchecked target IDs

Published Dec 19, 2025 · Updated Dec 19, 2025

Broken access control in Turms IM Server 0.10.0-SNAPSHOT and earlier allows remote authenticated users to read other users' status data. The handleQueryUserOnlineStatusesRequest() method accepts caller-supplied user IDs and retrieves each target's session status without an authorization check. Any valid account can expose online state, device type, login timestamps, and session details for arbitrary users.

CVSS severity6.5
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Broken access control in Turms IM Server 0.10.0-SNAPSHOT and earlier allows remote authenticated users to read other users' status data. The handleQueryUserOnlineStatusesRequest() method accepts caller-supplied user IDs and retrieves each target's session status without an authorization check. Any valid account can expose online state, device type, login timestamps, and session details for arbitrary users.

The record

CVE
CVE-2025-66911
Published
Dec 19, 2025
Updated
Dec 19, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-639, CWE-284, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 19, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 19, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
CWE-284Improper Access Control
T1213Data from Information Repositories

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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