silverstripe/framework allows upload of dangerous file types
Some potentially dangerous file types exist in File.allowed_extensions which could allow a malicious CMS user to upload files that then get executed in the security context of the website. We have removed the ability to upload .css, .js, .potm, .dotm, .xltm and .jar files in the default configuration. Since allowed_extensions are synced to webserver configuration (in assets/.htaccess) automatically, this will also deny access to any existing uploads with these extensions.
Review our security guidelines for the Common Web Platform and the File Security guide for SilverStripe 4 to find out how to add or remove extensions.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | silverstripe/framework | >= 3.6.5-rc1, < 3.6.6, >= 4.0.3-rc1, < 4.0.4, >= 4.1.0-rc1, < 4.1.1 | 3.6.6, 4.0.4, 4.1.1 |
References
- https://github.com/silverstripe/silverstripe-framework/commit/0408048653fafc52e02b4dbc6288e14e634ac613
- https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/SS-2018-014-1.yaml
- https://github.com/silverstripe/silverstripe-framework
- https://www.silverstripe.org/download/security-releases/ss-2018-014
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-434- Platform
- Composer
- Package
silverstripe/framework- Disclosed
- 27.05.2024
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-vcg6-8fxc-x5cq - CC BY 4.0
Vulnerability history: silverstripe/framework
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
- 93
- First → latest
- 11.2019 08.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- Critical 3
- High 13
- Medium 69
- Low 8
Disclosures per year
- 2019: 5
- 2020: 2
- 2021: 0
- 2022: 23
- 2023: 3
- 2024: 53
- 2025: 6
- 2026: 1
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silverstripe/framework allows upload of dangerous file types this entry
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