CVE-2025-8558: insider threat Missing Auth (CVSS 5.4)

Description

Insider Threat Management (ITM) Server versions prior to 7.17.2 contain an authentication bypass vulnerability that allows unauthenticated users on an adjacent network to perform agent unregistration when the number of registered agents exceeds the licensed limit. Successful exploitation prevents the server from receiving new events from affected agents, resulting in a partial loss of integrity and availability with no impact to confidentiality.

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CVSS v3.1 Score

5.4

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Weakness Type (CWE)

CWE-306 Missing Authentication

Affected Products

Vendor	Product	Versions
proofpoint	insider_threat_management_server	< 7.17.2

References

Other References

https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2025-003

Frequently Asked Questions

What is CVE-2025-8558? +

Insider Threat Management (ITM) Server versions prior to 7.17.2 contain an authentication bypass vulnerability that allows unauthenticated users on an adjacent network to perform agent unregistration when the number of registered agents exceeds the licensed limit. Successful exploitation prevents the server from receiving new events from affected agents, resulting in a partial loss of integrity and availability with no impact to confidentiality. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2025-8558? +

CVE-2025-8558 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-8558? +

CVE-2025-8558 affects products from proofpoint, specifically: insider_threat_management_server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-8558? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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