CVE-2026-34381

### 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` ```apache Require all denied ``` <img width="408" height="403" alt="imagen" src="https://github.com/user-attachments/assets/95f0d389-a1a9-4dc4-9840-7f189d2c58ff" /> **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) ```apache <Directory ${APACHE_DOCUMENT_ROOT}> AllowOverride None </Directory> ``` <img width="492" height="328" alt="imagen" src="https://github.com/user-attachments/assets/2f2e09b1-0c2e-4932-8698-a40f6b92e917" /> `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: <img width="1528" height="624" alt="imagen" src="https://github.com/user-attachments/assets/50e66fde-ff41-4efa-adc9-ceeb5b23a97d" /> ```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. <img width="1161" height="784" alt="imagen" src="https://github.com/user-attachments/assets/25d81e44-9a7c-4991-b72e-6e664d176695" /> **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 ``` <img width="1239" height="294" alt="imagen" src="https://github.com/user-attachments/assets/84c1bcd1-47d7-4115-ac0f-653b0a6d7301" /> **Step 3: Unauthenticated request retrieves the file:** ```bash curl -X GET 'http://TARGET/adm_my_files/documents_research/TEST-SENSITIVE/sensitive_poc.txt' # Response: full file contents — no authentication required ``` <img width="1051" height="150" alt="imagen" src="https://github.com/user-attachments/assets/1ed7fab7-59cb-4d5b-8c60-12108490d1e4" /> **Step 4: Confirm folder is role-restricted:** ```sql 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:** ```apache <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):** ```apache <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](https://x.com/PwnedRar_) > [LinkedIn](https://www.linkedin.com/in/juanfelipeoz/)