How severe is CVE-2025-66911?

CVE-2025-66911 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-66911 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66911?

CVE-2025-66911 affects Turms-im Turms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66911?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-66911 have an EU (EUVD) identifier?

Yes. CVE-2025-66911 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204539.

When was CVE-2025-66911 published?

CVE-2025-66911 was published on 2025-12-19 and last updated on 2026-06-17.

CVE-2025-66911

CVE-2025-66911 is a medium-severity vulnerability in Turms-im Turms with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-204539
Weakness: CWE-284
Affected product: Turms-im Turms
Published: 2025-12-19
Last modified: 2026-06-17

Description

Turms IM Server v0.10.0-SNAPSHOT and earlier contains a broken access control vulnerability in the user online status query functionality. The handleQueryUserOnlineStatusesRequest() method in UserServiceController.java allows any authenticated user to query the online status, device information, and login timestamps of arbitrary users without proper authorization checks.

Frequently asked questions

What is CVE-2025-66911?: Turms IM Server v0.10.0-SNAPSHOT and earlier contains a broken access control vulnerability in the user online status query functionality. The handleQueryUserOnlineStatusesRequest() method in UserServiceController.java allows any authenticated user to query the online status, device information, and login timestamps of arbitrary users without proper authorization checks.
How severe is CVE-2025-66911?: CVE-2025-66911 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-66911 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66911?: CVE-2025-66911 affects Turms-im Turms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66911?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66911 have an EU (EUVD) identifier?: Yes. CVE-2025-66911 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204539.
When was CVE-2025-66911 published?: CVE-2025-66911 was published on 2025-12-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:turms-im:turms:0.10.0-snapshot:*:*:*:*:*:*:*

More vulnerabilities in Turms-im Turms

CVE-2025-66909 — High (CVSS 7.5): Turms AI-Serving module v0.10.0-SNAPSHOT and earlier contains an image decompression bomb denial of service…
CVE-2025-66906 — Medium (CVSS 6.1): Cross Site Request Forgery (CSRF) vulnerability in Turms Admin API thru v0.10.0-SNAPSHOT allows attackers to gain…
CVE-2025-66910 — Medium (CVSS 6.0): Turms Server v0.10.0-SNAPSHOT and earlier contains a plaintext password storage vulnerability in the administrator…
CVE-2025-66908 — Medium (CVSS 5.3): Turms AI-Serving module v0.10.0-SNAPSHOT and earlier contains an improper file type validation vulnerability in the OCR…

All CVEs affecting Turms-im Turms →

Other CWE-284 (Improper Access Control) vulnerabilities

CVE-2026-50746 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi…
CVE-2026-46978 — Critical (CVSS 10.0): Vulnerability in the Oracle Solaris product of Oracle Systems (component: Remote Administration Daemon). The…
CVE-2026-35308 — Critical (CVSS 10.0): Vulnerability in the Oracle Coherence product of Oracle Fusion Middleware (component: Centralized Third Party Jars).…
CVE-2026-35307 — Critical (CVSS 10.0): Vulnerability in the Oracle Coherence product of Oracle Fusion Middleware (component: Core). Supported versions that…
CVE-2026-46695 — Critical (CVSS 10.0): Boxlite is a sandbox service that allows users to create lightweight virtual machines (Boxes) and launch OCI containers…
CVE-2026-46840 — Critical (CVSS 10.0): Vulnerability in Oracle REST Data Services (component: Backend-as-a-Service). Supported versions that are affected are…

Browse all CWE-284 (Improper Access Control) vulnerabilities →