What’s Vulnerable › Vulnerabilities

CVE-2021-36172

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-02 · updated 2026-06-17
• Weakness: CWE-611

Description

An improper restriction of XML external entity reference vulnerability in the parser of XML responses of FortiPortal before 6.0.6 may allow an attacker who controls the producer of XML reports consumed by FortiPortal to trigger a denial of service or read arbitrary files from the underlying file system by means of specifically crafted XML documents.

Affected products

• Fortinet FortiPortal: from 4.0.0 through 4.0.4; from 4.1.0 through 4.1.2; from 4.2.0 through 4.2.4; from 5.0.0 through 5.0.3; from 5.1.0 through 5.1.2; from 5.2.0 through 5.2.6 — fixed in 5.3.7, 6.0.6

How to fix

Upgrade to a fixed version: Fortinet FortiPortal 5.3.7, 6.0.6. Check the vendor advisory for mitigations.

References

• https://fortiguard.com/advisory/FG-IR-21-104
• https://fortiguard.com/advisory/FG-IR-21-104

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