How severe is CVE-2020-6643?

CVE-2020-6643 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-6643 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-6643?

CVE-2020-6643 affects Fortinet Fortiisolator. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-6643?

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

When was CVE-2020-6643 published?

CVE-2020-6643 was published on 2020-03-12 and last updated on 2026-06-17.

CVE-2020-6643

CVE-2020-6643 is a medium-severity vulnerability in Fortinet Fortiisolator with a CVSS 3.x base score of 5.4. 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 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Fortinet Fortiisolator
Published: 2020-03-12
Last modified: 2026-06-17

Description

An improper neutralization of input vulnerability in the URL Description in Fortinet FortiIsolator version 1.2.2 allows a remote authenticated attacker to perform a cross site scripting attack (XSS).

Frequently asked questions

What is CVE-2020-6643?: An improper neutralization of input vulnerability in the URL Description in Fortinet FortiIsolator version 1.2.2 allows a remote authenticated attacker to perform a cross site scripting attack (XSS).
How severe is CVE-2020-6643?: CVE-2020-6643 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-6643 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-6643?: CVE-2020-6643 affects Fortinet Fortiisolator. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-6643?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-6643 published?: CVE-2020-6643 was published on 2020-03-12 and last updated on 2026-06-17.

References

https://fortiguard.com/advisory/FG-IR-19-270

Affected products (1)

cpe:2.3:a:fortinet:fortiisolator:*:*:*:*:*:*:*:*

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