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CVE-2021-24021

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-06 · updated 2026-06-17
• Weakness: CWE-79

Description

An improper neutralization of input vulnerability [CWE-79] in FortiAnalyzer versions 6.4.3 and below, 6.2.7 and below and 6.0.10 and below may allow a remote authenticated attacker to perform a stored cross site scripting attack (XSS) via the column settings of Logview in FortiAnalyzer, should the attacker be able to obtain that POST request, via other, hypothetical attacks.

Affected products

• Fortinet FortiAnalyzer: from 6.0.0 before 6.2.8; from 6.4.0 before 6.4.4 — fixed in 6.2.8, 6.4.4

How to fix

Upgrade to a fixed version: Fortinet FortiAnalyzer 6.2.8, 6.4.4. Check the vendor advisory for mitigations.

References

• https://fortiguard.com/advisory/FG-IR-20-098
• https://fortiguard.com/advisory/FG-IR-20-098

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