ACTIVELY EXPLOITED

CVE-2020-13671: Drupal core Un-restricted Upload of File

Facts
VendorDrupal
ProductDrupal core
Actively exploitedYes
Added to CISA KEV18 Jan 2022
CISA federal deadline18 Jul 2022
Weakness (CWE)CWE-434

Required action (CISA's text)

Apply updates per vendor instructions.

Description (NVD)

Improper sanitization in the extension file names is present in Drupal core.

SOURCES

Other Drupal flaws

Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.