error311 FileRise up to 3.19.x /api/file/snippet.php improper authentication

Summaryinfo

A vulnerability described as problematic has been identified in error311 FileRise up to 3.19.x. Affected by this vulnerability is an unknown functionality of the file /api/file/snippet.php. Executing a manipulation can lead to improper authentication. This vulnerability is handled as CVE-2026-64856. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in error311 FileRise up to 3.19.x and classified as problematic. This vulnerability affects an unknown code block of the file /api/file/snippet.php. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality. CVE summarizes:

FileRise is a self-hosted web-based file manager with multi-file upload, editing, and batch operations. Prior to 3.20.0, FileRise /api/file/snippet.php does not apply the standard authenticated-session guard before processing short text preview requests. The endpoint still performs FileRise ACL checks, so normal installations do not expose an unauthenticated arbitrary file read, but unauthenticated requests can reach ACL evaluation instead of receiving an immediate 401 response. Only additional unusual proxy-header or ACL misconfiguration is documented as allowing requests to proceed into path and file-content handling. This issue is fixed in version 3.20.0.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-64856 since 07/20/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

By approaching the search of inurl:api/file/snippet.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 3.20.0 eliminates this vulnerability.

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Productinfo

Vendor

• error311

Name

• FileRise

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19

Website

• Product: https://github.com/error311/FileRise/

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