Admidio is an open-source user management solution. Prior to version 5.0.10, the sensitive `mode=export` action in `modules/sso/keys.php` exports a PKCS#12 bundle containing the configured private key and certificate, but the CSRF validation line is commented out. A forged cross-site POST from an administrator session can therefore trigger private key export without a valid form token. Version 5.0.10 contains a fix.

Affected: Packagist: admidio/admidio

## Summary

The sensitive `mode=export` action in `modules/sso/keys.php` exports a PKCS#12 bundle containing the configured private key and certificate, but the CSRF validation line is commented out. A forged cross-site POST from an administrator session can therefore trigger private key export without a valid form token.

## Vulnerable Code Links

- https://github.com/Admidio/admidio/blob/v5.0.9/modules/sso/keys.php#L83-L94 - https://github.com/Admidio/admidio/blob/v5.0.9/src/SSO/Service/KeyService.php#L108-L150

## Vulnerable Code

```php // modules/sso/keys.php case 'export': // SecurityUtils::validateCsrfToken($_POST['adm_csrf_token']); $keyService = new KeyService($gDb); $password = admFuncVariableIsValid($_POST, 'key_password', 'string'); $keyService->exportToPkcs12($getKeyUUID, $password); break; ```

```php // src/SSO/Service/KeyService.php public function exportToPkcs12(string $keyUUID, string $password = '') { $ssoKey = new Key($this->db); $ssoKey->readDataByUuid($keyUUID); ... openssl_pkcs12_export($certificate, $pkcs12, $privateKey, $password, ["friendly_name" => $name]); header('Content-Type: application/x-pkcs12'); header('Content-Disposition: attachment; filename="' . $filename . '.p12"'); echo $pkcs12; exit; } ```

## What Does The Code Mean

The export route accepts a key UUID and export password from the request, then returns a PKCS#12 bundle containing the private key material and certificate as a direct browser download.

## Why The Code Is Vulnerable

T…