CVE-2021-27900

Name: CVE-2021-27900
Creator: NVD / NIST
Published: 2021-04-06T22:15:12.89+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 2.45%

Last modified Jun 17, 2026

CVE-2021-27900 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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. EPSS estimates a 2.45% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

2.45%

82.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-862

Affected Software

Vendor	Product	Versions
Proofpoint	Insider Threat Management	>= 7.9.0, < 7.9.3
Proofpoint	Insider Threat Management	>= 7.10.0, < 7.10.3
Proofpoint	Insider Threat Management	>= 7.11.0, < 7.11.1

References

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

Timeline

Published: Apr 6, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27900?

How severe is CVE-2021-27900?

CVE-2021-27900 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 2.45% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27900?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27900?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST