How severe is CVE-2020-12811?

CVE-2020-12811 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-12811 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12811?

CVE-2020-12811 primarily affects Fortinet Fortianalyzer. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-12811?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-12811 published?

CVE-2020-12811 was published on 2020-09-24 and last updated on 2026-06-17.

CVE-2020-12811

CVE-2020-12811 is a medium-severity vulnerability in Fortinet Fortianalyzer with a CVSS 3.x base score of 6.1. 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: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (52nd 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 script-related HTML tags in a web page in FortiManager 6.2.0, 6.2.1, 6.2.2, and 6.2.3and FortiAnalyzer 6.2.0, 6.2.1, 6.2.2, and 6.2.3 may allow an attacker to execute a cross site scripting (XSS) via the Identify Provider name field.

Frequently asked questions

What is CVE-2020-12811?: An improper neutralization of script-related HTML tags in a web page in FortiManager 6.2.0, 6.2.1, 6.2.2, and 6.2.3and FortiAnalyzer 6.2.0, 6.2.1, 6.2.2, and 6.2.3 may allow an attacker to execute a cross site scripting (XSS) via the Identify Provider name field.
How severe is CVE-2020-12811?: CVE-2020-12811 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-12811 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12811?: CVE-2020-12811 primarily affects Fortinet Fortianalyzer. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-12811?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-12811 published?: CVE-2020-12811 was published on 2020-09-24 and last updated on 2026-06-17.

References

https://fortiguard.com/advisory/FG-IR-20-005

Affected products (2)

cpe:2.3:a:fortinet:fortianalyzer:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortimanager:*:*:*:*:*:*:*:*

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