diff --git a/portal-web/docroot/html/portlet/wiki/history_navigation.jsp b/portal-web/docroot/html/portlet/wiki/history_navigation.jsp
index 20071acabb395ff38445d0f0a716354c2b71188c..0da800db3e0e91d6474d4d22de37fdf3b1fa9004 100644
--- a/portal-web/docroot/html/portlet/wiki/history_navigation.jsp
+++ b/portal-web/docroot/html/portlet/wiki/history_navigation.jsp
@@ -170,7 +170,7 @@ if (type.equals("html")) {
 					/>
 
 					<c:if test="<%= Validator.isNotNull(wikiPage.getSummary()) %>">
-						<%= StringPool.COLON + StringPool.SPACE + wikiPage.getSummary() %>
+						<%= StringPool.COLON + StringPool.SPACE + HtmlUtil.escape(wikiPage.getSummary()) %>
 					</c:if>
 
 					<c:if test="<%= wikiPage.isMinorEdit() %>">
