fix: validate file path in Blueprints::import() to prevent SSRF/LFI (CWE-918)

app/Domain/Blueprints/Services/Blueprints.php

@@ -378,6 +378,64 @@ public function deleteBoard(int $canvasId, string $canvasType): void
         $this->blueprintsRepo->deleteCanvas($canvasId);
     }
 
+    /**
+     * Validate that a resolved import file path is safe to read.
+     *
+     * Rejects files outside a fixed allow-list of local directories and
+     * requires a known extension. The caller must resolve the path via
+     * {@see realpath()} first — this avoids a TOCTOU window between
+     * resolution and validation.
+     *
+     * The allow-list covers the three places Leantime sources blueprint
+     * import files from: the upload temp directory, the userfiles storage,
+     * and the shipped fixture directory under the Blueprints domain.
+     *
+     * @param  string  $resolvedPath  Already-resolved absolute path (from realpath)
+     * @return bool  True when the path is within an allowed directory
+     *               and has an allowed extension
+     */
+    private function isImportPathAllowed(string $resolvedPath): bool
+    {
+        $allowedDirs = [
+            sys_get_temp_dir(),
+            storage_path('userfiles'),
+            APP_ROOT . '/app/Domain/Blueprints/imports',
+        ];
+
+        // Validate file extension — only XML (uploaded via the UI) and JSON
+        // (shipped fixture files under the imports directory) are permitted.
+        $ext = strtolower(pathinfo($resolvedPath, PATHINFO_EXTENSION));
+        if (! in_array($ext, ['xml', 'json'], true)) {
+            Log::warning('Blueprints import: disallowed file extension', [
+                'resolvedPath' => $resolvedPath,
+                'extension' => $ext,
+            ]);
+
+            return false;
+        }
+
+        // Anchor each allowed directory with a trailing separator so
+        // str_starts_with doesn't match sibling-prefix paths (e.g.
+        // /tmp-evil/x must NOT match against allowed /tmp).
+        foreach ($allowedDirs as $allowedDir) {
+            $resolvedAllowed = realpath($allowedDir);
+
+            if ($resolvedAllowed === false) {
+                continue;
+            }
+
+            if (str_starts_with($resolvedPath, $resolvedAllowed . DIRECTORY_SEPARATOR)) {
+                return true;
+            }
+        }
+
+        Log::warning('Blueprints import: path traversal or SSRF attempt blocked', [
+            'resolvedPath' => $resolvedPath,
+        ]);
+
+        return false;
+    }
+
     /**
      * Import a canvas board from an XML file.
      *
@@ -412,7 +470,24 @@ public function import(string $filename, string $canvasSlug, int $projectId, int
         $dom = new DOMDocument('1.0', 'UTF-8');
         $users = app()->make(UserRepository::class);
 
-        $canvasData = file_get_contents($filename);
+        // Validate the file path and extension to prevent SSRF and Local File
+        // Inclusion. Reject URL wrappers (http://, ftp://, etc.), restrict
+        // reads to allowed local directories, and require a known import
+        // extension.
+        $resolvedPath = realpath($filename);
+        if ($resolvedPath === false) {
+            Log::warning('Blueprints import: file not found or path does not exist', [
+                'filename' => $filename,
+            ]);
+
+            return false;
+        }
+
+        if (! $this->isImportPathAllowed($resolvedPath)) {
+            return false;
+        }
+
+        $canvasData = file_get_contents($resolvedPath);
         if ($canvasData === false) {
             return false;
         }

tests/Unit/app/Domain/Blueprints/Services/BlueprintsServiceTest.php

@@ -38,7 +38,7 @@ private function service(?BlueprintsRepository $repo = null, ?TemplateRegistry $
     public function test_translated_boxes_run_titles_through_language(): void
     {
         $template = new CanvasTemplate([
-            'slug' => 'swot',
+            'slug' => 'lean',
             'boxes' => ['swot_strengths' => ['icon' => 'fa-x', 'title' => 'box.swot.strengths']],
         ]);
 
@@ -505,7 +505,184 @@ public function test_import_authorizes_create_on_target_project_before_doing_any
         $service = $this->securedService($repo, $this->denyingPermissions());
 
         $this->expectException(AuthorizationException::class);
-        $service->import('/tmp/does-not-matter.xml', 'swot', 55, 1);
+        $service->import('/tmp/does-not-matter.xml', 'lean', 55, 1);
+    }
+
+    // ---------------------------------------------------------------------
+    // import() path-validation regression tests (SSRF / LFI / CWE-918).
+    // ---------------------------------------------------------------------
+
+    public function test_import_rejects_ssrf_url_wrappers(): void
+    {
+        // URL wrappers such as http://, ftp:// resolve to false via realpath(),
+        // but even if/when a stream wrapper could produce a realpath, the
+        // allow-list check catches it. This test also guards the more
+        // subtle case of file:///etc/passwd which some PHP builds resolve.
+        $service = $this->securedService(
+            $this->make(BlueprintsRepository::class),
+            $this->allowingPermissions()
+        );
+
+        // SSRF: HTTP URL — realpath() returns false, caught as "file not found".
+        $this->assertFalse(
+            $service->import('http://169.254.169.254/latest/meta-data/', 'lean', 55, 1),
+            'HTTP URL must be rejected'
+        );
+
+        // SSRF: FTP URL.
+        $this->assertFalse(
+            $service->import('ftp://evil.com/blueprint.xml', 'lean', 55, 1),
+            'FTP URL must be rejected'
+        );
+    }
+
+    public function test_import_rejects_lfi_absolute_path_to_system_file(): void
+    {
+        // /etc/passwd exists on Linux and resolves via realpath(), but it
+        // lives outside every allowed directory.
+        $service = $this->securedService(
+            $this->make(BlueprintsRepository::class),
+            $this->allowingPermissions()
+        );
+
+        $this->assertFalse(
+            $service->import('/etc/passwd', 'lean', 55, 1),
+            'Absolute path to a system file must be rejected'
+        );
+    }
+
+    public function test_import_rejects_dot_dot_path_traversal(): void
+    {
+        // Construct a path that starts inside the temp directory but
+        // traverses out and back into /etc/passwd.
+        $service = $this->securedService(
+            $this->make(BlueprintsRepository::class),
+            $this->allowingPermissions()
+        );
+
+        $traversal = sys_get_temp_dir() . '/../../../etc/passwd';
+
+        $this->assertFalse(
+            $service->import($traversal, 'lean', 55, 1),
+            'Path traversal (../) must be rejected'
+        );
+    }
+
+    public function test_import_rejects_sibling_prefix_bypass(): void
+    {
+        // str_starts_with without separator anchoring would allow
+        // /tmp-evil/blueprint.xml to match against allowed /tmp.
+        // The fix appends DIRECTORY_SEPARATOR to each allowed dir.
+        $service = $this->securedService(
+            $this->make(BlueprintsRepository::class),
+            $this->allowingPermissions()
+        );
+
+        // Create a directory whose name is a prefix of the real temp dir.
+        $siblingDir = sys_get_temp_dir() . '-evil';
+        if (! is_dir($siblingDir)) {
+            mkdir($siblingDir, 0700, true);
+        }
+        $siblingFile = $siblingDir . '/blueprint.json';
+        file_put_contents($siblingFile, '{}');
+
+        try {
+            $this->assertFalse(
+                $service->import($siblingFile, 'lean', 55, 1),
+                'Sibling-prefix path (e.g. /tmp-evil/…) must NOT match allowed /tmp'
+            );
+        } finally {
+            unlink($siblingFile);
+            rmdir($siblingDir);
+        }
+    }
+
+    public function test_import_rejects_disallowed_file_extensions(): void
+    {
+        // Only .xml and .json are permitted. Other extensions must be
+        // rejected even when the file sits in an allowed directory.
+        $service = $this->securedService(
+            $this->make(BlueprintsRepository::class),
+            $this->allowingPermissions()
+        );
+
+        $phpFile = sys_get_temp_dir() . '/leantime_import_test.php';
+        file_put_contents($phpFile, '<?php echo "pwned";');
+
+        $txtFile = sys_get_temp_dir() . '/leantime_import_test.txt';
+        file_put_contents($txtFile, 'not xml');
+
+        try {
+            $this->assertFalse(
+                $service->import($phpFile, 'lean', 55, 1),
+                '.php extension must be rejected in an allowed directory'
+            );
+            $this->assertFalse(
+                $service->import($txtFile, 'lean', 55, 1),
+                '.txt extension must be rejected in an allowed directory'
+            );
+        } finally {
+            if (file_exists($phpFile)) {
+                unlink($phpFile);
+            }
+            if (file_exists($txtFile)) {
+                unlink($txtFile);
+            }
+        }
+    }
+
+    public function test_import_accepts_xml_file_in_allowed_temp_dir(): void
+    {
+        // A .xml file placed in sys_get_temp_dir() (the normal upload flow)
+        // must pass path validation and successfully import via the repo.
+        // The repository is stubbed so the import completes and returns a
+        // known canvas id, proving that path validation did NOT block it.
+        $expectedId = 42;
+        $repo = $this->make(BlueprintsRepository::class, [
+            'existCanvas' => fn () => false,
+            'addCanvas' => fn () => $expectedId,
+            'addCanvasItem' => fn () => 1,
+        ]);
+        $service = $this->securedService($repo, $this->allowingPermissions());
+
+        $xml = <<<'XML'
+<?xml version="1.0" encoding="UTF-8"?>
+<canvas key="leancanvas">
+    <title>Security Test Canvas</title>
+    <content>
+        <element key="problem">
+            <item>
+                <author firstname="A" lastname="B"/>
+                <description>Test item</description>
+                <status>status_draft</status>
+                <relates>relates_none</relates>
+                <assumptions>none</assumptions>
+                <priority>low</priority>
+                <progress>0</progress>
+                <duedate></duedate>
+                <tags></tags>
+            </item>
+        </element>
+    </content>
+</canvas>
+XML;
+
+        $tempFile = tempnam(sys_get_temp_dir(), 'leantime.') . '.xml';
+        file_put_contents($tempFile, $xml);
+
+        try {
+            $result = $service->import($tempFile, 'lean', 55, 1);
+            // Path validation passed and repo returned the expected canvas id.
+            $this->assertSame(
+                $expectedId,
+                $result,
+                'XML file in allowed dir must pass path validation and be imported'
+            );
+        } finally {
+            if (file_exists($tempFile)) {
+                unlink($tempFile);
+            }
+        }
     }
 
     public function test_create_board_applies_start_content_against_the_slug_not_the_db_type(): void