Drupal access bypass vulnerability
Drupal core 7.x versions before 7.57 when using Drupal's private file system, Drupal will check to make sure a user has access to a file before allowing the user to view or download it. This check fails under certain conditions in which one module is trying to grant access to the file and another is trying to deny it, leading to an access bypass vulnerability. This vulnerability is mitigated by the fact that it only occurs for unusual site configurations.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | drupal/core | >= 7.0, < 7.57 | 7.57 |
| Composer package | drupal/drupal | >= 7.0, < 7.57 | 7.57 |
| Drupal (core) | drupal/core | >= 7.0, < 7.57, >= 7.0, < 7.57 | 7.57 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2017-6928
- https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2017-6928.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2017-6928.yaml
- https://github.com/drupal/core
- https://lists.debian.org/debian-lts-announce/2018/02/msg00030.html
- https://www.debian.org/security/2018/dsa-4123
- https://www.drupal.org/sa-core-2018-001
- CVSS vector
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N- Weakness (CWE)
CWE-732- 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-66mv-q8r2-hj8w - CC BY 4.0
Vulnerability history: drupal/core
All published vulnerabilities of this package (Drupal (core)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 165
- First → latest
- 02.2018 09.2026
- Without a fix
- 3
- Exploited in attacks
- 5
Severity breakdown
- Critical 17
- High 44
- Medium 72
- Low 6
- Unrated 26
Disclosures per year
- 2018: 4
- 2019: 14
- 2020: 12
- 2021: 11
- 2022: 61
- 2023: 6
- 2024: 36
- 2025: 8
- 2026: 13
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Drupal access bypass vulnerability this entry
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