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CVE-2020-13671

8.8
HIGHCVSS v3.1 Base Score
4.50%
LOW RiskEPSS (89th percentile)
KEV

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. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.

Published: 11/20/2020
Modified: 11/3/2025
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ACTIVELY EXPLOITED IN THE WILD

This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Vulnerability Name:

Drupal core Un-restricted Upload of File

Vendor / Product:

Drupal Drupal core

Required Action:

Apply updates per vendor instructions.

Due Date: 7/18/2022(OVERDUE)
Added to KEV:

1/18/2022

Notes:

https://nvd.nist.gov/vuln/detail/CVE-2020-13671

Vulnerability Summary

CVSS v3 Score

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2 Score

6.5

AV:N/AC:L/Au:S/C:P/I:P/A:P

EPSS Score (Exploitation Probability)

4.50%LOW Exploitation Risk
89th percentile

This vulnerability has a 4.50% probability of being exploited in the next 30 days, ranking higher than 89% of all scored CVEs.

CWE Classification

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