CVE-2020-13671

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.

CVSS v3.1

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

CVSS v3.1

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

CVSS v3.1

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H

CVSS v2.0

6.5 MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:P

EPSS

35.35% chance of exploitation in the next 30 days, 98th percentile

CISA KEV

added 2022-01-18

Published

2020-11-20

Updated

2025-10-21

Proof-of-concept exploits (2)

• Dungsocool/CVE-2020-13671
• Dungsocool/CVE-2020-13671-old

References

• CVE Record
• NVD entry

Related

• CVE-2014-3120
• CVE-2017-10271
• CVE-2017-11610
• CVE-2017-12635
• CVE-2017-18349
• CVE-2017-5638