Drupal core unrestricted file upload
Priority LOW 38CWE-434Published · Updated
Key facts
- Attack vector
- —
- Privileges required
- —
- User interaction
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- Attack complexity
- —
- Impact type
- Code execution
- Confidentiality · integrity · availability
- —
- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub. Impact type from CWE-434.
Summary
Drupal 8 core's file_save_upload() function does not strip the leading and trailing dot ('.') from filenames, like Drupal 7 did. Users with the ability to upload files with any extension in conjunction with contributed modules may be able to use this to upload system files such as .htaccess in order to bypass protections afforded by Drupal's default .htaccess file. After this fix, file_save_upload() now trims leading and trailing dots from filenames.
Why it matters now
Fix Fixed drupal/core (Packagist): 8.7.11, 8.8.1
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | drupal/core (Packagist) | 8.0.0 to before 8.7.11 | 8.7.11 | Patch available | GHSA-7gwj-7fhm-vw4w |
| — | drupal/core (Packagist) | 8.8.0 to before 8.8.1 | 8.8.1 | Patch available | GHSA-7gwj-7fhm-vw4w |
- drupal/core (Packagist) Vendor— Affected 8.0.0 to before 8.7.11 Fixed in 8.7.11 Patch available GHSA-7gwj-7fhm-vw4w
- drupal/core (Packagist) Vendor— Affected 8.8.0 to before 8.8.1 Fixed in 8.8.1 Patch available GHSA-7gwj-7fhm-vw4w
Remediation
- Fix · GHSA-7gwj-7fhm-vw4w drupal/core (Packagist) Fixed in 8.7.11 Advisory →
- Fix · GHSA-7gwj-7fhm-vw4w drupal/core (Packagist) Fixed in 8.8.1 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-7gwj-7fhm-vw4w
References
Sources
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