Combodo · bdalsass · Mar 5, 2026 · Mar 5, 2026 · Mar 5, 2026 · Mar 5, 2026
diff --git a/core/attributedef.class.inc.php b/core/attributedef.class.inc.php
@@ -4344,7 +4344,9 @@ public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
 		} else {
 			$sValue = self::RenderWikiHtml($sValue, true /* wiki only */);
 
-			return "<div class=\"HTML ibo-is-html-content\" $sStyle>".InlineImage::FixUrls($sValue).'</div>';
+			$sImageHtml = UserRights::IsLoggedIn() ? InlineImage::FixUrls($sValue) : InlineImage::ReplaceInlineImagesWithBase64Representation($sValue);
+
+			return "<div class=\"HTML ibo-is-html-content\" $sStyle>".$sImageHtml.'</div>';
 		}
 
 	}

diff --git a/core/inlineimage.class.inc.php b/core/inlineimage.class.inc.php
@@ -296,6 +296,46 @@ public static function FixUrls($sHtml)
 		return $sHtml;
 	}
 
+	/**
+	 * Replace <img> tags with a data-img-id attribute by the actual image in base64 representation
+	 * so that the image can be displayed even if the download URL is not accessible (e.g. in unauthenticated approval templates)
+	 *
+	 * @param string $sHtml The HTML fragment to process
+	 *
+	 * @return String The modified HTML
+	 * @since 3.2.3
+	 */
+	public static function ReplaceInlineImagesWithBase64Representation(string $sHtml): String
+	{
+		return preg_replace_callback(
+			'/<img\s+[^>]*data-img-id="(\d+)"[^>]*>/i',
+			function ($matches) {
+
+				// Extract inline image ID from the tag
+				$id = $matches[1];
+
+				try {
+					// Retrieve inline image
+					$oInline = MetaModel::GetObject(InlineImage::class, $id, true, true);
+					$oOrmDocument = $oInline->Get('contents');
+
+					// Replace src image by the base64 representation
+					$sInlineImageAsBase64 = base64_encode($oOrmDocument->GetData());
+					$sDataUri = 'data:'.$oOrmDocument->GetMimeType().';base64,'.$sInlineImageAsBase64;
+					$sImage = preg_replace('/src=["\'][^"\']+["\']/', 'src="'.$sDataUri.'"', $matches[0]);
+
+					// Remove sensitive information (the image ID and secret) from the tag
+					$sImage = preg_replace('/data-img-id="\d+"\s+data-img-secret="\w+"/', '', $sImage);
+				} catch (Exception $e) {
+					$sImage = '<img src="" alt="'.Dict::S('UI:MissingInlineImage').'">';
+				}
+
+				return $sImage;
+			},
+			$sHtml
+		);
+	}
+
 	/**
 	 * Add an extra attribute data-img-id for images which are based on an actual InlineImage
 	 * so that we can later reconstruct the full "src" URL when needed

diff --git a/dictionaries/en.dictionary.itop.ui.php b/dictionaries/en.dictionary.itop.ui.php
@@ -1471,6 +1471,7 @@
 	'UI:SelectInlineImageToUpload' => 'Select the image to upload',
 	'UI:AvailableInlineImagesLegend' => 'Available images',
 	'UI:NoInlineImage' => 'There is no image available on the server. Use the "Browse" button above to select an image from your computer and upload it to the server.',
+	'UI:MissingInlineImage' => 'Missing image',
 
 	'UI:ToggleFullScreen' => 'Toggle Maximize / Minimize',
 	'UI:Button:ResetImage' => 'Recover the previous image',

diff --git a/dictionaries/fr.dictionary.itop.ui.php b/dictionaries/fr.dictionary.itop.ui.php
@@ -1398,6 +1398,7 @@
 	'UI:SelectInlineImageToUpload' => 'Sélectionnez l\'image à ajouter',
 	'UI:AvailableInlineImagesLegend' => 'Images disponibles',
 	'UI:NoInlineImage' => 'Il n\'y a aucune image de disponible sur le serveur. Utilisez le bouton "Parcourir" (ci-dessus) pour sélectionner une image sur votre ordinateur et la télécharger sur le serveur.',
+	'UI:MissingInlineImage' => 'Image introuvable',
 	'UI:ToggleFullScreen' => 'Agrandir / Minimiser',
 	'UI:Button:ResetImage' => 'Récupérer l\'image initiale',
 	'UI:Button:RemoveImage' => 'Supprimer l\'image',

diff --git a/pages/ajax.document.php b/pages/ajax.document.php
@@ -34,6 +34,8 @@
 	require_once(APPROOT.'/application/startup.inc.php');
 
 	require_once(APPROOT.'/application/loginwebpage.class.inc.php');
+	LoginWebPage::DoLoginEx();
+
 	IssueLog::Trace('----- Request: '.utils::GetRequestUri(), LogChannels::WEB_REQUEST);
 
 	$oPage = new DownloadPage("");
@@ -43,7 +45,6 @@
 
 	switch ($operation) {
 		case 'download_document':
-			LoginWebPage::DoLoginEx('backoffice', false);
 			$id = utils::ReadParam('id', '');
 			$sField = utils::ReadParam('field', '');
 			if ($sClass == 'Attachment') {
@@ -63,8 +64,6 @@
 			break;
 
 		case 'download_inlineimage':
-			// No login is required because the "secret" protects us
-			// Benefit: the inline image can be inserted into any HTML (templating = $this->html(public_log)$)
 			$id = utils::ReadParam('id', '');
 			$sSecret = utils::ReadParam('s', '');
 			$iCacheSec = 31556926; // One year ahead: an inline image cannot change

diff --git a/tests/php-unit-tests/unitary-tests/core/InlineImageTest.php b/tests/php-unit-tests/unitary-tests/core/InlineImageTest.php
@@ -9,6 +9,7 @@
 
 use Combodo\iTop\Test\UnitTest\ItopDataTestCase;
 use InlineImage;
+use ormDocument;
 
 class InlineImageTest extends ItopDataTestCase
 {
@@ -98,4 +99,36 @@ public function testFixUrls_shouldReplaceImagesSrcWithCurrentAppRootUrlAndSecret
 		$this->assertStringContainsString(\utils::EscapeHtml(\utils::GetAbsoluteUrlAppRoot().INLINEIMAGE_DOWNLOAD_URL.'123&s=abc'), $sResult);
 		$this->assertStringContainsString(\utils::EscapeHtml(\utils::GetAbsoluteUrlAppRoot().INLINEIMAGE_DOWNLOAD_URL.'456&s=def'), $sResult);
 	}
+
+	/**
+	 * @covers InlineImage::ReplaceInlineImagesWithBase64Representation
+	 */
+	public function testReplaceInlineImagesWithBase64Representation()
+	{
+		// create an inline image in the database
+		$oInlineImage = $this->createObject(InlineImage::class, [
+			'expire' => (new \DateTime('+1 day'))->format('Y-m-d H:i:s'),
+			'item_class' => 'UserRequest',
+			'item_id' => 999,
+			'item_org_id' => 1,
+			'contents' => new ormDocument('0x89504E470D0A1A0A0000000D494844520000000E0000000E08060000001F482DD1000000017352474200AECE1CE90000000467414D410000B18F0BFC6105000000097048597300000EC300000EC301C76FA8640000001E49444154384F63782BA3F29F1CCC802E402C1ED588078F6AC483E9AF11008B8BA9C08A7A3F290000000049454E44AE426082', 'image/png', 'square_red.png'),
+			'secret' => 'a94bff3ea6a872bdbc359a1704cdddb3',
+		]);
+		$sInlineImageId = $oInlineImage->GetKey();
+		$sInlineImageSecret = $oInlineImage->Get('secret');
+
+		// HTML with inline image
+		$sHtml = <<<HTML
+<img src="http://host/iTop/pages/ajax.document.php?operation=download_inlineimage&amp;id=$sInlineImageId&amp;s=$sInlineImageSecret" data-img-id="$sInlineImageId" data-img-secret="$sInlineImageSecret" />
+HTML;
+
+		// expected HTML with base64 representation of the image
+		$sExpected = <<<HTML
+<img src="data:image/png;base64,MHg4OTUwNEU0NzBEMEExQTBBMDAwMDAwMEQ0OTQ4NDQ1MjAwMDAwMDBFMDAwMDAwMEUwODA2MDAwMDAwMUY0ODJERDEwMDAwMDAwMTczNTI0NzQyMDBBRUNFMUNFOTAwMDAwMDA0Njc0MTRENDEwMDAwQjE4RjBCRkM2MTA1MDAwMDAwMDk3MDQ4NTk3MzAwMDAwRUMzMDAwMDBFQzMwMUM3NkZBODY0MDAwMDAwMUU0OTQ0NDE1NDM4NEY2Mzc4MkJBM0YyOUYxQ0NDODAyRTQwMkMxRUQ1ODgwNzhGNkFDNDgzRTlBRjExMDA4QjhCQTlDMDhBN0EzRjI5MDAwMDAwMDA0OTQ1NEU0NEFFNDI2MDgy"  />
+HTML;
+
+		// test the method
+		$sResult = InlineImage::ReplaceInlineImagesWithBase64Representation($sHtml);
+		$this->assertEquals($sExpected, $sResult);
+	}
 }