CVE-2020-13671 (GCVE-0-2020-13671)

Vulnerability from cvelistv5 – Published: 2020-11-20 15:40 – Updated: 2025-10-21 23:35
VLAI? CISA KEV
Summary
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.
Severity ?
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • Remote code execution
Assigner
References
Impacted products
Vendor Product Version
Drupal Drupal Core Affected: 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
Create a notification for this product.
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 8ea2c1cd-a5fa-4b6d-afcd-798522aa121c

Vulnerability ID: CVE-2020-13671

Status: Confirmed

Status Updated: 2022-01-18 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2022-01-18
Asserted: 2022-01-18
Scope
Notes: KEV entry: Drupal core Un-restricted Upload of File | Affected: Drupal / Drupal core | Description: Improper sanitization in the extension file names is present in Drupal core. | Required action: Apply updates per vendor instructions. | Due date: 2022-07-18 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2020-13671
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-434
Feed CISA Known Exploited Vulnerabilities Catalog
Product Drupal core
Due Date 2022-07-18
Date Added 2022-01-18
Vendorproject Drupal
Vulnerabilityname Drupal core Un-restricted Upload of File
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 12:28 UTC | Updated: 2026-02-06 07:17 UTC
Show details on NVD website
To clipboard 

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      "dataType": "CVE_RECORD",
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    }
  }
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.