CVE-2021-27900

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-04-06 · updated 2026-06-17
Weakness: CWE-862

Description

The Proofpoint Insider Threat Management Server (formerly ObserveIT Server) is missing an authorization check on several pages in the Web Console. This enables a view-only user to change any configuration setting and delete any registered agents. All versions before 7.11.1 are affected.

Affected products

Proofpoint Insider Threat Management: from 7.9.0 before 7.9.3; from 7.10.0 before 7.10.3; from 7.11.0 before 7.11.1 — fixed in 7.10.3, 7.11.1, 7.9.3

How to fix

Upgrade to a fixed version: Proofpoint Insider Threat Management 7.10.3, 7.11.1, 7.9.3. Check the vendor advisory for mitigations.

References

https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2021-0005
https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2021-0005

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