TI-2025-07838 Aliases CVE-2025-8558 GHSA-5mj6-fm92-ww5m

Missing authentication in Proofpoint Insider Threat Management Server

LOW 13CWE-306Published 2025-11-03 · Updated 2025-11-03

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: Present
Impact type: Security bypass
Confidentiality · integrity · availability: None · Low · Low
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00628 50th percentileScored 2026-11-07

Fix Fixed Insider Threat Management (ITM) Server (Proofpoint): 7.17.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Proofpoint	Insider Threat Management (ITM) Server	before 7.17.2	7.17.2	Patch available	CNA

Insider Threat Management (ITM) Server VendorProofpoint Affected before 7.17.2 Fixed in 7.17.2 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:proofpoint:insider_threat_management_server::::::::	before 7.17.2	Vulnerable	Proofpoint

cpe:2.3:a:proofpoint:insider_threat_management_server:*:*:*:*:*:*:*:* Versions before 7.17.2 Vulnerable ·Proofpoint

Remediation

Fix · CNA Insider Threat Management (ITM) Server (Proofpoint) Fixed in 7.17.2

Timeline

2026-10-02 Threatist record created from CVE-2025-8558
2026-10-03 Alias added: GHSA-5mj6-fm92-ww5m
2026-10-30 EPSS moved to the 50th–90th percentile

References

Other 1

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

TI-2020-08565 The Proofpoint Insider Threat Management Server (formerly ObserveIT Server) before 7.9.1… CVSS 3.1CRITICAL 9.8
TI-2020-08563 The Proofpoint Insider Threat Management Server (formerly ObserveIT Server) before 7.9.1… CVSS 3.1CRITICAL 9.8
TI-2020-08562 The Proofpoint Insider Threat Management Server (formerly ObserveIT Server) before 7.9.1… CVSS 3.1CRITICAL 9.8
TI-2021-17766 Proofpoint Insider Threat Management Server contains a SQL injection vulnerability in the… CVSS 3.1CRITICAL 9.8
TI-2020-08564 The Proofpoint Insider Threat Management Server (formerly ObserveIT Server) before 7.9.1… CVSS 3.1HIGH 7.2
TI-2021-17767 Proofpoint Insider Threat Management Server contains an unsafe deserialization… CVSS 3.1HIGH 7.3

See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences