diff --git a/lib/Service/InitialStateService.php b/lib/Service/InitialStateService.php
index e9d2a78b7c..caafc07875 100644
--- a/lib/Service/InitialStateService.php
+++ b/lib/Service/InitialStateService.php
@@ -28,6 +28,7 @@
 use OCA\Richdocuments\AppConfig;
 use OCA\Richdocuments\AppInfo\Application;
 use OCA\Richdocuments\Db\Wopi;
+use OCA\Theming\ImageManager;
 use OCP\AppFramework\Services\IInitialState;
 use OCP\Defaults;
 use OCP\IConfig;
@@ -39,6 +40,7 @@ class InitialStateService {
 	public function __construct(
 		private IInitialState $initialState,
 		private AppConfig $appConfig,
+		private ImageManager $imageManager,
 		private CapabilitiesService $capabilitiesService,
 		private IURLGenerator $urlGenerator,
 		private Defaults $themingDefaults,
@@ -101,15 +103,16 @@ private function provideOptions(): void {
 			'UIMode' => $this->config->getAppValue(Application::APPNAME, 'uiDefaults-UIMode', 'notebookbar')
 		]);
 
-		$logoSet = $this->config->getAppValue('theming', 'logoheaderMime', '') !== '';
+		$logoType = 'logoheader';
+		$logoSet = $this->imageManager->hasImage($logoType);
 		if (!$logoSet) {
-			$logoSet = $this->config->getAppValue('theming', 'logoMime', '') !== '';
+			$logoType = 'logo';
+			$logoSet = $this->imageManager->hasImage($logoType);
 		}
 
-		$this->initialState->provideInitialState('theming-customLogo', ($logoSet ?
-			$this->urlGenerator->getAbsoluteURL($this->themingDefaults->getLogo())
-			: false));
+		$logo = $logoSet ? $this->imageManager->getImageUrlAbsolute($logoType) : false;
 
+		$this->initialState->provideInitialState('theming-customLogo', $logo);
 		$this->initialState->provideInitialState('open_local_editor', $this->config->getAppValue(Application::APPNAME, 'open_local_editor', 'yes') === 'yes');
 	}
 }
diff --git a/src/helpers/coolParameters.js b/src/helpers/coolParameters.js
index f374a9570d..e02e5c9c3f 100644
--- a/src/helpers/coolParameters.js
+++ b/src/helpers/coolParameters.js
@@ -162,9 +162,10 @@ const generateCSSVarTokens = () => {
 	// cleanup theme elements after extracting property values
 	lightElement.remove()
 	darkElement.remove()
+
 	const customLogo = loadState('richdocuments', 'theming-customLogo', false)
 	if (customLogo) {
-		str += `--nc-custom-logo=${window.OCA?.Theming?.cacheBuster ?? 0};`
+		str += `--nc-custom-logo=${encodeURIComponent(customLogo)};`
 	}
 
 	const rootEl = document.querySelector(':root')
diff --git a/tests/stub.phpstub b/tests/stub.phpstub
index 9dda632f24..107cd2fde9 100644
--- a/tests/stub.phpstub
+++ b/tests/stub.phpstub
@@ -79,6 +79,35 @@ namespace OCA\Files_Sharing\Event {
 	}
 }
 
+namespace OCA\Theming {
+	use OCA\Theming\Service\BackgroundService;
+	use OCA\Files\IAppData;
+	use OCP\ICacheFactory;
+	use OCP\IConfig;
+	use OCP\ITempManager;
+	use OCP\IURLGenerator;
+	use PSR\Log\LoggerInterface;
+
+	class ImageManager {
+		public function __construct(
+			IConfig $config,
+			IAppData $appData,
+			IURLGenerator $urlGenerator,
+			ICacheFactory $cacheFactory,
+			LoggerInterface $logger,
+			ITempManager $tempManager,
+			BackgroundService $backgroundService
+		) {
+		}
+
+		public function hasImage(string $key): bool {
+		}
+
+		public function getImageUrlAbsolute(string $key): string {
+		}
+	}
+}
+
 class OC_Helper {
 	public static function getFileTemplateManager() {
 	}