Vulnerability Intelligence Report
Drupal core Un-restricted Upload of File
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.
CISA KEV
SSVC: Active Exploitation
CVSS Base Score
8.8
HIGH
Exploitability:2.9
Impact Score:5.9
EPSS Probability:4.27%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-434 ↗CWE-434 Unrestricted Upload of File with Dangerous Type
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Drupal | Drupal Core | 9.0 versions prior to 9.0.8 (affected), 8.9 versions prior to 8.9.9 (affected), 8.8 versions prior to 8.8.11 (affected), 7 versions prior to 7.74 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Drupal.org · Vendor · USA |
| Reserved | 2020-05-28T00:00:00 |
| Published | 2020-11-20T15:40:39 |
| Last Updated | 2025-10-21T23:35:32 |
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