How severe is CVE-2020-12816?

CVE-2020-12816 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-2020-12816 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12816?

CVE-2020-12816 affects Fortinet Fortinac. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-12816?

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

When was CVE-2020-12816 published?

CVE-2020-12816 was published on 2020-09-24 and last updated on 2026-06-17.

CVE-2020-12816

CVE-2020-12816 is a medium-severity vulnerability in Fortinet Fortinac 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% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Fortinet Fortinac
Published: 2020-09-24
Last modified: 2026-06-17

Description

An improper neutralization of input vulnerability in FortiNAC before 8.7.2 may allow a remote authenticated attacker to perform a stored cross site scripting attack (XSS) via the UserID of Admin Users.

Frequently asked questions

What is CVE-2020-12816?: An improper neutralization of input vulnerability in FortiNAC before 8.7.2 may allow a remote authenticated attacker to perform a stored cross site scripting attack (XSS) via the UserID of Admin Users.
How severe is CVE-2020-12816?: CVE-2020-12816 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-2020-12816 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12816?: CVE-2020-12816 affects Fortinet Fortinac. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-12816?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-12816 published?: CVE-2020-12816 was published on 2020-09-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:fortinet:fortinac:*:*:*:*:*:*:*:*

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