CVE-2020-18704: Unrestricted Upload of File with Dangerous Type in Django-Widgy v0.8.4 allows remote attackers to execute arbi

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-18704 is a critical-severity flaw (CVSS 9.8) affecting widgy. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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'.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.9% (top 13%)
CISA exploited list	No
Weakness	CWE-434
Published	2021-08-16
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: fusionbox

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-08-16 18:15 UTCPublished CVE record published
2026-06-17 02:59 UTCUpdated Record last modified

fusionbox widgy DOWNGRADE

Affected: 0.8.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.8.4

1. Check installed version

apt-cache policy widgy || rpm -q widgy || widgy --version

2. No fixed release: DOWNGRADE to a release before 0.8.4 (Debian / Ubuntu)

apt-cache madison widgy sudo apt install widgy=<VERSION_BEFORE_0.8.4> sudo apt-mark hold widgy

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list widgy sudo dnf downgrade widgy-<VERSION_BEFORE_0.8.4> sudo dnf versionlock add widgy

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-18704?

widgy: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-18704 being exploited?

CVE-2020-18704 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-18704 affect?

CVE-2020-18704 affects widgy. Severity is critical (CVSS 9.8). 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 urgent is CVE-2020-18704?

Priority 66/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Django vulnerabilities

References

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