EasyCorp EasyAdminBundle up to 5.0.12 FileField/ImageField file.html.twig cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, was found in EasyCorp EasyAdminBundle up to 5.0.12. Affected is an unknown function of the file templates/crud/field/file.html.twig of the component FileField/ImageField. Such manipulation leads to cross site scripting. This vulnerability is uniquely identified as CVE-2026-54087. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in EasyCorp EasyAdminBundle up to 5.0.12. It has been rated as problematic. Affected by this issue is some unknown functionality of the file templates/crud/field/file.html.twig of the component FileField/ImageField. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity. CVE summarizes:

EasyAdmin is a fast and modern admin generator for Symfony applications. From 5.0.0 until 5.0.13, FileField and ImageField can accept browser-executable uploads while templates/crud/field/file.html.twig links to stored files for inline same-origin rendering without a download attribute or Content-Disposition attachment header. When uploads are stored under the public web root, an attacker with access to an affected form can upload HTML through FileField or SVG through ImageField, and JavaScript executes in an authenticated administrator's origin when the file is opened from the backend. Exploitation requires a privilege gap between the uploader and viewer. The issue can expose session or CSRF tokens and enable privilege escalation, but does not permit PHP or PHTML code execution because Symfony guessExtension does not produce those stored extensions. This issue is fixed in version 5.0.13.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-54087 since 06/11/2026. The exploitation is known to be easy. The attack may be launched remotely. Additional levels of successful authentication are required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading to version 5.0.13 eliminates this vulnerability.

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Productinfo

Vendor

• EasyCorp

Name

• EasyAdminBundle

Version

• 5.0.0
• 5.0.1
• 5.0.2
• 5.0.3
• 5.0.4
• 5.0.5
• 5.0.6
• 5.0.7
• 5.0.8
• 5.0.9
• 5.0.10
• 5.0.11
• 5.0.12

Website

• Product: https://github.com/EasyCorp/EasyAdminBundle/

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