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GHSA-7fh7-8xqm-3g88

HighCVSS 7.5 / 10

Published Mar 31, 2026·Last modified Mar 31, 2026

Affected Components(0)

No affected components available

Description

Summary

Admidio relies on adm_my_files/.htaccess to deny direct HTTP access to uploaded documents. The Docker image ships with AllowOverride None in the Apache configuration, which causes Apache to silently ignore all .htaccess files. As a result, any file uploaded to the documents module regardless of the role-based permissions configured in the UI, is directly accessible over HTTP without authentication by anyone who knows the file path. The file path is disclosed in the upload response JSON.

Root Cause

File 1: Intended protection (ignored):
adm_my_files/.htaccess

Require all denied

File 2: Apache config that neutralizes it:

Command in order to search in Docker container: docker exec admidio-sec-app cat /etc/apache2/apache2.conf

/etc/apache2/apache2.conf (Docker image)

<Directory ${APACHE_DOCUMENT_ROOT}>
    AllowOverride None
</Directory>

AllowOverride None instructs Apache to skip .htaccess processing entirely, the deny rule never executes. The upload directory is inside the web root at /opt/app-root/src/adm_my_files/ and returns HTTP 200 for direct requests.

File 3: Upload response leaks the direct URL: system/file_upload.php, upload response JSON:

{
  "files": [{
    "name": "sensitive_poc.txt",
    "url": "http://TARGET/adm_my_files/documents_research/TEST-SENSITIVE/sensitive_poc.txt"
  }]
}

Verified PoC

Step 1: Admin creates a restricted folder (visible only to Administrator role):

modules/documents-files.php → permissions set to role Administrator only.

Step 2: Admin uploads a file to the restricted folder.

Upload response returns:

http://TARGET/adm_my_files/documents_research/TEST-SENSITIVE/sensitive_poc.txt

Step 3: Unauthenticated request retrieves the file:

curl -X GET 'http://TARGET/adm_my_files/documents_research/TEST-SENSITIVE/sensitive_poc.txt'
# Response: full file contents — no authentication required

Step 4: Confirm folder is role-restricted:

SELECT fil_name, fol_name, fol_public FROM adm_files JOIN adm_folders ON fil_fol_id = fol_id 
ORDER BY fil_id DESC LIMIT 5; -- fol_public = 0, role restricted — yet file is publicly accessible

Impact

Any document uploaded to Admidio including files restricted to specific roles is publicly accessible via direct HTTP request with no authentication required
Role-based access control on the documents module is completely bypassed at the filesystem level
Sensitive organizational documents (contracts, member data, financial records) are exposed to anyone who can guess or construct the file path
The upload API response discloses the direct URL to the uploader, making path enumeration trivial

Recommended Fix

Option 1 (preferred): Enable AllowOverride in Apache config:

<Directory /opt/app-root/src/adm_my_files>
    AllowOverride All
</Directory>

Option 2: Move uploads outside the web root:
Store uploaded files in a directory outside DOCUMENT_ROOT and serve them exclusively through Admidio's download handler (modules/documents-files.php?mode=download), which enforces role checks before serving the file.

Option 3: Apache-level explicit deny (does not require .htaccess):

<Directory /opt/app-root/src/adm_my_files>
    Require all denied
</Directory>

The most robust long-term fix is Option 2 — moving uploads outside the web root eliminates the dependency on Apache configuration correctness entirely.

Reported by: Juan Felipe Oz @JF0x0r

LinkedIn

Risk Scores

Base Score

7.5

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information.

Threat Intelligence

6.9

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS

0.57%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit

Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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High severity

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