diff --git a/source/java/org/alfresco/rest/api/PublicApiTenantWebScriptServletRuntime.java b/source/java/org/alfresco/rest/api/PublicApiTenantWebScriptServletRuntime.java
index 53b2353e73..b1a3acc50d 100644
--- a/source/java/org/alfresco/rest/api/PublicApiTenantWebScriptServletRuntime.java
+++ b/source/java/org/alfresco/rest/api/PublicApiTenantWebScriptServletRuntime.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2005-2012 Alfresco Software Limited.
+ * Copyright (C) 2005-2015 Alfresco Software Limited.
  *
  * This file is part of Alfresco
  *
@@ -18,6 +18,8 @@
  */
 package org.alfresco.rest.api;
 
+import java.util.regex.Pattern;
+
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
@@ -31,6 +33,8 @@ import org.springframework.extensions.webscripts.servlet.ServletAuthenticatorFac
 
 public class PublicApiTenantWebScriptServletRuntime extends TenantWebScriptServletRuntime
 {
+    private static final Pattern CMIS_URI_PATTERN = Pattern.compile(".*/cmis/versions/[0-9]+\\.[0-9]+/.*");
+    
 	public PublicApiTenantWebScriptServletRuntime(RuntimeContainer container, ServletAuthenticatorFactory authFactory, HttpServletRequest req,
 			HttpServletResponse res, ServerProperties serverProperties)
 	{
@@ -54,6 +58,11 @@ public class PublicApiTenantWebScriptServletRuntime extends TenantWebScriptServl
             // NOTE: this is unlikely, and we'll take the hit if the path contains a semi-colon
             pathInfo = req.getPathInfo();
         }
+        // MNT-13057 fix, do not decode CMIS uris.
+        else if (CMIS_URI_PATTERN.matcher(requestURI).matches())
+        {
+            pathInfo = requestURI.substring(serviceContextPath.length());
+        }
         else
         {
             pathInfo = URLDecoder.decode(requestURI.substring(serviceContextPath.length()));
diff --git a/source/test-java/org/alfresco/rest/api/tests/TestCMIS.java b/source/test-java/org/alfresco/rest/api/tests/TestCMIS.java
index 65858abd46..cf5709f92a 100644
--- a/source/test-java/org/alfresco/rest/api/tests/TestCMIS.java
+++ b/source/test-java/org/alfresco/rest/api/tests/TestCMIS.java
@@ -127,7 +127,7 @@ import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.springframework.context.ApplicationContext;
-import org.springframework.test.AssertThrows;
+import org.springframework.extensions.surf.util.URLEncoder;
 
 public class TestCMIS extends EnterpriseTestApi
 {
@@ -2081,6 +2081,70 @@ public class TestCMIS extends EnterpriseTestApi
         assertEquals("Ipsum and so on", content);
     }
     
+    @Test
+    public void testMNT_13057() throws Exception
+    {
+        final TestNetwork network1 = getTestFixture().getRandomNetwork();
+
+        String username = "user" + System.currentTimeMillis();
+        PersonInfo personInfo = new PersonInfo(username, username, username, TEST_PASSWORD, null, null, null, null, null, null, null);
+        TestPerson person1 = network1.createUser(personInfo);
+        String person1Id = person1.getId();
+        
+        String guid = GUID.generate();
+        String name = guid + "_KRUIS_LOGO_100%_PMS.txt";
+        String urlFileName = guid + "_KRUIS_LOGO_100%25_PMS.txt";
+        
+        final String siteName = "site" + System.currentTimeMillis();
+
+        TenantUtil.runAsUserTenant(new TenantRunAsWork<NodeRef>()
+        {
+            @Override
+            public NodeRef doWork() throws Exception
+            {
+                SiteInformation siteInfo = new SiteInformation(siteName, siteName, siteName, SiteVisibility.PRIVATE);
+                TestSite site = repoService.createSite(null, siteInfo);
+
+                String name = GUID.generate();
+                NodeRef folderNodeRef = repoService.createFolder(site.getContainerNodeRef(DOCUMENT_LIBRARY_CONTAINER_NAME), name);
+                return folderNodeRef;
+            }
+        }, person1Id, network1.getId());
+        
+        // Create a document...
+        publicApiClient.setRequestContext(new RequestContext(network1.getId(), person1Id));
+        CmisSession cmisSession = publicApiClient.createPublicApiCMISSession(Binding.atom, CMIS_VERSION_11);
+        Folder docLibrary = (Folder)cmisSession.getObjectByPath("/Sites/" + siteName + "/documentLibrary");
+        
+        Map<String, Object> properties = new HashMap<String, Object>();
+        {
+            properties.put(PropertyIds.OBJECT_TYPE_ID, TYPE_CMIS_DOCUMENT);
+            properties.put(PropertyIds.NAME, name);
+        }
+        
+        ContentStreamImpl fileContent = new ContentStreamImpl();
+        {
+            ContentWriter writer = new FileContentWriter(TempFileProvider.createTempFile(GUID.generate(), ".txt"));
+            writer.putContent("Ipsum");
+            ContentReader reader = writer.getReader();
+            fileContent.setMimeType(MimetypeMap.MIMETYPE_TEXT_PLAIN);
+            fileContent.setStream(reader.getContentInputStream());
+        }
+
+        /* Create document */
+        Document doc = docLibrary.createDocument(properties, fileContent, VersioningState.MAJOR);
+        
+        String id = doc.getId();
+        assertNotNull(id);
+        Map<String, String> params = new HashMap<String, String>();
+        params.put("id", URLEncoder.encode(id));
+        
+        urlFileName += "?id=" + URLEncoder.encode(id);
+
+        HttpResponse response = publicApiClient.get("/" + network1.getId() + "/public/cmis/versions/1.1/atom/content/" + urlFileName, null);
+        assertEquals(200, response.getStatusCode());
+    }
+    
     @Test
     public void testMNT10430() throws Exception
     {