CVE-2026-7879

Received Received - Intake

Unauthorized File Access in Concrete CMS

Publication date: 2026-05-21

Last updated on: 2026-05-22

Assigner: ConcreteCMS

Description

In Concrete CMS 9.5.0 and below, the submit_password() method in concrete/controllers/single_page/download_file.php allows unauthorized file access since downloading permission-restricted files bypasses the view_file permission check. Files without passwords can be downloaded and any user who knows a file's password can download a password protected file regardless of whether they have permission to access the file. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 6.3 with vector CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N. Thanks Youssef Eid for reporting

CVSS Scores

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Meta Information

Published

2026-05-21

Last Modified

2026-05-22

Generated

2026-07-02

AI Q&A

2026-05-22

EPSS Evaluated

2026-06-30

NVD

CVE-2026-7879

EUVD

EUVD-2026-31356

Affected Vendors & Products

Vendor	Product	Version / Range
concretecms	concrete_cms	to 9.5.1 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

This vulnerability exists in Concrete CMS version 9.5.0 and below, specifically in the submit_password() method located in concrete/controllers/single_page/download_file.php.

The issue allows unauthorized file access because the system bypasses the usual permission check (view_file) when downloading files that are permission-restricted.

As a result, files without passwords can be downloaded by anyone, and files that are password protected can be downloaded by any user who knows the file's password, regardless of whether they have permission to access the file.

Impact Analysis

This vulnerability can lead to unauthorized access to files that should be restricted.

Users without proper permissions may be able to download sensitive or confidential files, either because the files have no password or because they know the password, bypassing the intended access controls.

This could result in data leakage, exposure of sensitive information, and potential misuse of the accessed files.

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