Laravel-Backpack CRUD up to 6.8.13/7.0.37 SingleBase64Image SingleBase64Image.php uploadFiles cross site scripting

Summaryinfo

A vulnerability classified as problematic was found in Laravel-Backpack CRUD up to 6.8.13/7.0.37. This affects the function SingleBase64Image::uploadFiles of the file src/app/Library/Uploaders/SingleBase64Image.php of the component SingleBase64Image. Executing a manipulation can lead to cross site scripting. This vulnerability is tracked as CVE-2026-54179. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as problematic was found in Laravel-Backpack CRUD up to 6.8.13/7.0.37. This vulnerability affects the function SingleBase64Image::uploadFiles of the file src/app/Library/Uploaders/SingleBase64Image.php of the component SingleBase64Image. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

backpack/crud provides Create, Read, Update & Delete (CRUD) functions for Backpack, a collection of Laravel packages that help users build custom administration panels. From 6.0.0 until 6.8.14 and 7.0.37, the src/app/Library/Uploaders/SingleBase64Image.php methods SingleBase64Image::uploadFiles and SingleBase64Image::uploadRepeatableFiles, used by image fields through withFiles(), accept any data URI beginning with data:image without validating the declared MIME subtype or decoded bytes, while src/app/Library/Uploaders/Support/FileNameGenerator.php method FileNameGenerator::getExtensionFromFile applies mime_content_type() to the data URI instead of the decoded content. An authenticated administrator can therefore store arbitrary file content under an extensionless filename on the configured disk, which can cause stored cross-site scripting or other unintended behavior when the file is served and accessed. This issue is fixed in version 7.0.38 and 6.8.14.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-54179 since 06/11/2026. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

By approaching the search of inurl:src/app/Library/Uploaders/SingleBase64Image.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 6.8.14 or 7.0.38 eliminates this vulnerability.

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Productinfo

Vendor

• Laravel-Backpack

Name

• CRUD

Version

• 6.8.0
• 6.8.1
• 6.8.2
• 6.8.3
• 6.8.4
• 6.8.5
• 6.8.6
• 6.8.7
• 6.8.8
• 6.8.9
• 6.8.10
• 6.8.11
• 6.8.12
• 6.8.13
• 7.0.0
• 7.0.1
• 7.0.2
• 7.0.3
• 7.0.4
• 7.0.5
• 7.0.6
• 7.0.7
• 7.0.8
• 7.0.9
• 7.0.10
• 7.0.11
• 7.0.12
• 7.0.13
• 7.0.14
• 7.0.15
• 7.0.16
• 7.0.17
• 7.0.18
• 7.0.19
• 7.0.20
• 7.0.21
• 7.0.22
• 7.0.23
• 7.0.24
• 7.0.25
• 7.0.26
• 7.0.27
• 7.0.28
• 7.0.29
• 7.0.30
• 7.0.31
• 7.0.32
• 7.0.33
• 7.0.34
• 7.0.35
• 7.0.36
• 7.0.37

Website

• Product: https://github.com/Laravel-Backpack/CRUD/

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