How severe is CVE-2020-7799?

CVE-2020-7799 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-7799 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 20% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-7799?

CVE-2020-7799 affects Fusionauth. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-7799?

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-2020-7799 published?

CVE-2020-7799 was published on 2020-01-28 and last updated on 2026-06-17.

CVE-2020-7799

CVE-2020-7799 is a high-severity vulnerability in Fusionauth with a CVSS 3.x base score of 7.2. Its EPSS exploit-prediction score of 20% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-917.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 9.0
EPSS exploit prediction: 20% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-917
Affected product: Fusionauth
Published: 2020-01-28
Last modified: 2026-06-17

Description

An issue was discovered in FusionAuth before 1.11.0. An authenticated user, allowed to edit e-mail templates (Home -> Settings -> Email Templates) or themes (Home -> Settings -> Themes), can execute commands on the underlying operating system by abusing freemarker.template.utility.Execute in the Apache FreeMarker engine that processes custom templates.

Frequently asked questions

What is CVE-2020-7799?: An issue was discovered in FusionAuth before 1.11.0. An authenticated user, allowed to edit e-mail templates (Home -> Settings -> Email Templates) or themes (Home -> Settings -> Themes), can execute commands on the underlying operating system by abusing freemarker.template.utility.Execute in the Apache FreeMarker engine that processes custom templates.
How severe is CVE-2020-7799?: CVE-2020-7799 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-7799 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 20% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-7799?: CVE-2020-7799 affects Fusionauth. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-7799?: 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-2020-7799 published?: CVE-2020-7799 was published on 2020-01-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:fusionauth:fusionauth:*:*:*:*:*:*:*:*

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