WWBN AVideo is an open source video platform. In versions up to and including 29.0, two endpoints (plugin/AI/receiveAsync.json.php and objects/EpgParser.php) in AVideo call isSSRFSafeURL() to validate user-supplied URLs, then fetch them using bare file_get_contents() without disabling PHP's automatic redirect following. An attacker can supply a URL pointing to a server they control that returns a 302 redirect to an internal/cloud-metadata address (e.g., http://169.254.169.254/latest/meta-data/). Since isSSRFSafeURL() only validates the initial URL, the redirect target bypasses all SSRF protections. Commit 603e7bf77a835584387327e35560262feb075db3 contains an updated fix.

Affected: Packagist: wwbn/avideo

### Summary

Two endpoints in AVideo call `isSSRFSafeURL()` to validate user-supplied URLs, then fetch them using bare `file_get_contents()` **without disabling PHP's automatic redirect following**. An attacker can supply a URL pointing to a server they control that returns a 302 redirect to an internal/cloud-metadata address (e.g., `http://169.254.169.254/latest/meta-data/`). Since `isSSRFSafeURL()` only validates the *initial* URL, the redirect target bypasses all SSRF protections.

A secondary finding is that 6+ callers of `isSSRFSafeURL()` discard the `$resolvedIP` out-parameter meant for DNS pinning, leaving them vulnerable to DNS rebinding TOCTOU attacks.

**Severity:** High — CVSS 3.1: 7.7 (AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N)

### Details

#### Finding 1: Redirect-Based SSRF Bypass

**Vulnerable code — `plugin/AI/receiveAsync.json.php` (line ~162–165):**

```php // SSRF Protection: Validate URL before fetching if (!isSSRFSafeURL($imageUrl)) { // blocked } else { $imageContent = file_get_contents($imageUrl); // ← FOLLOWS REDIRECTS! } ```

**Vulnerable code — `objects/EpgParser.php` (line ~358–362):**

```php if (!isSSRFSafeURL($this->url)) { throw new \RuntimeException('URL blocked by SSRF protection'); } $this->content = @file_get_contents($this->url); // ← FOLLOWS REDIRECTS! ```

**Safe code for comparison — `objects/functions.php`, `url_get_contents()`:**

```php $opts = ['http' => ['follow_location' => 0]]; // Disable auto-redirect $context = stream…