How severe is CVE-2020-12817?

CVE-2020-12817 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-12817 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12817?

CVE-2020-12817 primarily affects Fortinet Fortianalyzer. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-12817?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-12817 published?

CVE-2020-12817 was published on 2020-09-24 and last updated on 2026-06-17.

CVE-2020-12817

CVE-2020-12817 is a high-severity vulnerability in Fortinet Fortianalyzer with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Fortinet Fortianalyzer
Published: 2020-09-24
Last modified: 2026-06-17

Description

An improper neutralization of input vulnerability in FortiAnalyzer before 6.4.1 and 6.2.5 may allow a remote authenticated attacker to inject script related HTML tags via Name parameter of Storage Connectors.

Frequently asked questions

What is CVE-2020-12817?: An improper neutralization of input vulnerability in FortiAnalyzer before 6.4.1 and 6.2.5 may allow a remote authenticated attacker to inject script related HTML tags via Name parameter of Storage Connectors.
How severe is CVE-2020-12817?: CVE-2020-12817 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-12817 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12817?: CVE-2020-12817 primarily affects Fortinet Fortianalyzer. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-12817?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-12817 published?: CVE-2020-12817 was published on 2020-09-24 and last updated on 2026-06-17.

References

https://fortiguard.com/advisory/FG-IR-20-054

Affected products (5)

cpe:2.3:a:fortinet:fortianalyzer:6.2.5:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortianalyzer:6.4.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortianalyzer:6.4.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortitester:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortitester:3.8.0:*:*:*:*:*:*:*

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