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DRUPAL-CORE-2020-012

Published Nov 18, 2020·Last modified Dec 10, 2025
Affected Components(3)
Packagist logodrupal/core
8.0.0 – 8.8.11
Packagist logodrupal/core
8.9.0 – 8.9.9
Packagist logodrupal/core
9.0.0 – 9.0.8
Description

Update November 18: Documented longer list of dangerous file extensions

Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations.

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Risk Scores
Base Score
0.0

Measures severity based on intrinsic characteristics of the vulnerability, independent of environment.

Threat Intelligence
0.0

No exploitation activity has been observed at this time. Continue routine monitoring.

EPSS
35.35%

The exploit probability is moderate. The vulnerability is likely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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