CVE-2017-6921— File REST resource does not properly validate
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I. Basic Information for CVE-2017-6921
Vulnerability Information
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Vulnerability Title
File REST resource does not properly validate
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Drupal 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Drupal是Drupal社区所维护的一套用PHP语言开发的免费、开源的内容管理系统。 Drupal 8.3.4之前的8.x版本中存在安全绕过漏洞。攻击者可利用该漏洞绕过安全限制，执行未授权的访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Drupal | Drupal Core | Drupal 8 ~ 8.3.4 | - |
II. Public POCs for CVE-2017-6921
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Drupal · 2019-01-15 · 3 CVEs total
| CVE-2018-7603 | Search Autocomplete | |
| CVE-2017-6924 | REST API can bypass comment approval - Access Bypass - Moderately Critical |
IV. Related Vulnerabilities
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Drupal core - Moderately critical - Gadget chain - SA-CORE-2 - CVE-2025-13080
Drupal core - Moderately critical - Denial of Service - SA-C - CVE-2025-31675
Drupal core - Moderately critical - Cross Site Scripting - S
Same vendor: Drupal
- CVE-2026-0748
Access bypass in Drupal 7 i18n_node translation UI - CVE-2026-1556
Information disclosure via file URI overwrite in File (Field - CVE-2026-4393
Automated Logout - Moderately critical - Cross-site request - CVE-2026-4933
Unpublished Node Permissions - Critical - Access bypass - SA - CVE-2026-3573
AI (Artificial Intelligence) - Moderately critical - Informa
V. Comments for CVE-2017-6921
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