Drupal Form API ignores access restrictions on submit buttons
The Form API in Drupal 6.x before 6.38 ignores access restrictions on submit buttons, which might allow remote attackers to bypass intended access restrictions by leveraging permission to submit a form with a button that has "#access" set to FALSE in the server-side form definition.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | drupal/core | >= 6.0, < 6.38 | 6.38 |
| Composer package | drupal/drupal | >= 6.0, < 6.38 | 6.38 |
| Drupal (core) | drupal/core | >= 6.0, < 6.38, >= 6.0, < 6.38 | 6.38 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2016-3165
- https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2016-3165.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2016-3165.yaml
- https://github.com/drupal/core
- https://www.drupal.org/SA-CORE-2016-001
- http://www.debian.org/security/2016/dsa-3498
- http://www.openwall.com/lists/oss-security/2016/02/24/19
- http://www.openwall.com/lists/oss-security/2016/03/15/10
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N- Weakness (CWE)
CWE-284- Platform
- Composer, Drupal
- Package
drupal/core, drupal/drupal- Disclosed
- 17.05.2022
- Updated
- 11.10.2026 11:18
Sources and licenses
OSV / GitHub Advisory Database - GHSA-4gh5-3hqj-x3pj - 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 Form API ignores access restrictions on submit buttons this entry
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