Drupal file REST resource does not properly validate
In Drupal 8 prior to 8.3.4; The file REST resource does not properly validate some fields when manipulating files. A site is only affected by this if the site has the RESTful Web Services (rest) module enabled, the file REST resource is enabled and allows PATCH requests, and an attacker can get or register a user account on the site with permissions to upload files and to modify the file resource.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | drupal/core | >= 8.0, < 8.3.4 | 8.3.4 |
| Composer package | drupal/drupal | >= 8.0, < 8.3.4 | 8.3.4 |
| Drupal (core) | drupal/core | >= 8.0, < 8.3.4, >= 8.0, < 8.3.4 | 8.3.4 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2017-6921
- https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2017-6921.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2017-6921.yaml
- https://github.com/drupal/core
- https://www.drupal.org/SA-CORE-2017-003
- https://www.drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-06-21/drupal-core-multiple
- http://www.securityfocus.com/bid/99222
- http://www.securitytracker.com/id/1038781
- CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N- Weakness (CWE)
CWE-20- Platform
- Composer, Drupal
- Package
drupal/core, drupal/drupal- Disclosed
- 13.05.2022
- Updated
- 11.10.2026 11:18
Sources and licenses
OSV / GitHub Advisory Database - GHSA-h377-287m-w2r9 - CC BY 4.0
Vulnerability history: drupal/core
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 146
- First → latest
- 02.2018 09.2026
- Without a fix
- 3
- Exploited in attacks
- 5
Severity breakdown
- Critical 15
- High 40
- Medium 60
- Low 5
- Unrated 26
Disclosures per year
- 2018: 4
- 2019: 14
- 2020: 12
- 2021: 11
- 2022: 55
- 2023: 6
- 2024: 23
- 2025: 8
- 2026: 13
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Drupal file REST resource does not properly validate this entry
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