How severe is CVE-2020-18704?

CVE-2020-18704 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-18704 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-18704?

CVE-2020-18704 affects Fusionbox Widgy. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-18704?

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

When was CVE-2020-18704 published?

CVE-2020-18704 was published on 2021-08-16 and last updated on 2026-06-17.

CVE-2020-18704

CVE-2020-18704 is a critical-severity vulnerability in Fusionbox Widgy with a CVSS 3.x base score of 9.8. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Fusionbox Widgy
Published: 2021-08-16
Last modified: 2026-06-17

Description

Unrestricted Upload of File with Dangerous Type in Django-Widgy v0.8.4 allows remote attackers to execute arbitrary code via the 'image' widget in the component 'Change Widgy Page'.

Frequently asked questions

What is CVE-2020-18704?: Unrestricted Upload of File with Dangerous Type in Django-Widgy v0.8.4 allows remote attackers to execute arbitrary code via the 'image' widget in the component 'Change Widgy Page'.
How severe is CVE-2020-18704?: CVE-2020-18704 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-18704 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-18704?: CVE-2020-18704 affects Fusionbox Widgy. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-18704?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-18704 published?: CVE-2020-18704 was published on 2021-08-16 and last updated on 2026-06-17.

References

https://github.com/fusionbox/django-widgy/issues/387

Affected products (1)

cpe:2.3:a:fusionbox:widgy:0.8.4:*:*:*:*:django:*:*

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