What’s Vulnerable › Vulnerabilities

CVE-2021-22158

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% 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-611

Description

The Proofpoint Insider Threat Management Server (formerly ObserveIT Server) is vulnerable to XML external entity (XXE) injection in the Web Console. The vulnerability requires admin user privileges and knowledge of the XML file's encryption key to successfully exploit. All versions before 7.11 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-2021-0003
• https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2021-0003

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