CVE-2025-30039

Unauthenticated session takeover via active-session listing

Published Aug 27, 2025 · Updated Aug 27, 2025

Missing authentication in CGM CLININET before 2024.MS4 allows remote attackers to take over active user sessions through a CGI endpoint. GetActiveSessions.pl returns live session identifiers without verifying the caller's identity. The application server must be reachable and a target session must be active; takeover inherits that user's privileges, including administrator rights.

CVSS severity9.0
Critical
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in CGM CLININET before 2024.MS4 allows remote attackers to take over active user sessions through a CGI endpoint. GetActiveSessions.pl returns live session identifiers without verifying the caller's identity. The application server must be reachable and a target session must be active; takeover inherits that user's privileges, including administrator rights.

The record

CVE
CVE-2025-30039
Published
Aug 27, 2025
Updated
Aug 27, 2025
Vendor
CompuGroup Medical
Product
CGM CLININET
Classifications
CWE-306, T1539
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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?

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  1. Affected versionversion=0 <2024.MS4

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

CompuGroup Medical · CGM CLININETversion=0 <2024.MS4

Published CVSS scores

9.0CERT PolskaCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1539Steal Web Session Cookie

Public exploit references

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Technologies

Your stack

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Your stack

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