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Moderate severityNVD Advisory· Published Jun 1, 2015· Updated May 6, 2026

CVE-2015-0218

CVE-2015-0218

Description

Cross-site request forgery (CSRF) vulnerability in auth/shibboleth/logout.php in Moodle through 2.5.9, 2.6.x before 2.6.7, 2.7.x before 2.7.4, and 2.8.x before 2.8.2 allows remote attackers to hijack the authentication of arbitrary users for requests that trigger a logout.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
moodle/moodlePackagist
< 2.6.72.6.7
moodle/moodlePackagist
>= 2.7.0, < 2.7.42.7.4
moodle/moodlePackagist
>= 2.8.0, < 2.8.22.8.2

Affected products

22
  • Moodle/Moodle22 versions
    cpe:2.3:a:moodle:moodle:2.5.4:*:*:*:*:*:*:*+ 21 more
    • cpe:2.3:a:moodle:moodle:2.5.4:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*range: <=2.5.9
    • cpe:2.3:a:moodle:moodle:2.5.0:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.5.1:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.5.2:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.5.3:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.5.5:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.5.6:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.5.7:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.5.8:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.6.0:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.6.1:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.6.2:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.6.3:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.6.4:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.6.5:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.6.6:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.7.0:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.7.1:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.7.2:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.7.3:*:*:*:*:*:*:*
    • cpe:2.3:a:moodle:moodle:2.8.0:*:*:*:*:*:*:*

Patches

4
693918c30e6b

MDL-47964 auth_shibboleth: Fix DOS on the shibboleth logout

https://github.com/moodle/moodleSimey LamezeNov 11, 2014via ghsa
commit
1 file changed · +18 −24
  • auth/shibboleth/logout.php+18 −24 modified
    @@ -8,45 +8,41 @@
 
 require_once($CFG->dirroot."/auth/shibboleth/auth.php");
 
+$action = optional_param('action', '', PARAM_ALPHA);
+$redirect = optional_param('return', '', PARAM_URL);
 
 // Find out whether host supports https
 $protocol = 'http://';
 if (is_https()) {
     $protocol = 'https://';
 }
 
-// Front channel logout
-if (
-        isset($_GET['return'])
-        && isset($_GET['action'])
-        && $_GET['action'] == 'logout'
-   ){
-
-    // Logout out user from application
-    // E.g. destroy application session/cookie etc
-    require_logout();
-
-    // Finally, send user to the return URL
-    redirect($_GET['return']);
+// If the shibboleth plugin is not enable, throw an exception.
+if (!is_enabled_auth('shibboleth')) {
+    throw new moodle_exception(get_string('pluginnotenabled', 'auth', 'shibboleth'));
 }
 
-// Back channel logout
-elseif (!empty($HTTP_RAW_POST_DATA)) {
+// Front channel logout.
+if ($action == 'logout' && !empty($redirect)) {
 
-    // Requires PHP 5
+    if ($USER->auth == 'shibboleth') {
+        // Logout out user from application.
+        require_logout();
+         // Finally, send user to the return URL.
+        redirect($redirect);
+    }
 
+} else if (!empty($HTTP_RAW_POST_DATA)) {
 
-    // Set SOAP header
+    // Back channel logout.
+    // Set SOAP header.
     $server = new SoapServer($protocol.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'/LogoutNotification.wsdl');
-
-
     $server->addFunction("LogoutNotification");
     $server->handle();
-}
 
-// Return WSDL
-else {
+} else {
 
+    // Return WSDL.
     header('Content-Type: text/xml');
 
     echo <<<WSDL
@@ -119,9 +115,7 @@
 </definitions>
 WSDL;
     exit;
-
 }
-
 /******************************************************************************/
 
 function LogoutNotification($SessionID){
b82b4c562b70

MDL-47964 auth_shibboleth: Fix DOS on the shibboleth logout

https://github.com/moodle/moodleSimey LamezeNov 11, 2014via ghsa
commit
1 file changed · +18 −24
  • auth/shibboleth/logout.php+18 −24 modified
    @@ -8,45 +8,41 @@
 
 require_once($CFG->dirroot."/auth/shibboleth/auth.php");
 
+$action = optional_param('action', '', PARAM_ALPHA);
+$redirect = optional_param('return', '', PARAM_URL);
 
 // Find out whether host supports https
 $protocol = 'http://';
 if ( isset($_SERVER['HTTPS']) && !empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on'){
     $protocol = 'https://';
 }
 
-// Front channel logout
-if (
-        isset($_GET['return'])
-        && isset($_GET['action'])
-        && $_GET['action'] == 'logout'
-   ){
-
-    // Logout out user from application
-    // E.g. destroy application session/cookie etc
-    require_logout();
-
-    // Finally, send user to the return URL
-    redirect($_GET['return']);
+// If the shibboleth plugin is not enable, throw an exception.
+if (!is_enabled_auth('shibboleth')) {
+    throw new moodle_exception(get_string('pluginnotenabled', 'auth', 'shibboleth'));
 }
 
-// Back channel logout
-elseif (!empty($HTTP_RAW_POST_DATA)) {
+// Front channel logout.
+if ($action == 'logout' && !empty($redirect)) {
 
-    // Requires PHP 5
+    if ($USER->auth == 'shibboleth') {
+        // Logout out user from application.
+        require_logout();
+         // Finally, send user to the return URL.
+        redirect($redirect);
+    }
 
+} else if (!empty($HTTP_RAW_POST_DATA)) {
 
-    // Set SOAP header
+    // Back channel logout.
+    // Set SOAP header.
     $server = new SoapServer($protocol.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'/LogoutNotification.wsdl');
-
-
     $server->addFunction("LogoutNotification");
     $server->handle();
-}
 
-// Return WSDL
-else {
+} else {
 
+    // Return WSDL.
     header('Content-Type: text/xml');
 
     echo <<<WSDL
@@ -119,9 +115,7 @@
 </definitions>
 WSDL;
     exit;
-
 }
-
 /******************************************************************************/
 
 function LogoutNotification($SessionID){
fb60e23a6793

MDL-47964 auth_shibboleth: Fix DOS on the shibboleth logout

https://github.com/moodle/moodleSimey LamezeNov 11, 2014via ghsa
commit
1 file changed · +18 −24
  • auth/shibboleth/logout.php+18 −24 modified
    @@ -8,45 +8,41 @@
 
 require_once($CFG->dirroot."/auth/shibboleth/auth.php");
 
+$action = optional_param('action', '', PARAM_ALPHA);
+$redirect = optional_param('return', '', PARAM_URL);
 
 // Find out whether host supports https
 $protocol = 'http://';
 if (is_https()) {
     $protocol = 'https://';
 }
 
-// Front channel logout
-if (
-        isset($_GET['return'])
-        && isset($_GET['action'])
-        && $_GET['action'] == 'logout'
-   ){
-
-    // Logout out user from application
-    // E.g. destroy application session/cookie etc
-    require_logout();
-
-    // Finally, send user to the return URL
-    redirect($_GET['return']);
+// If the shibboleth plugin is not enable, throw an exception.
+if (!is_enabled_auth('shibboleth')) {
+    throw new moodle_exception(get_string('pluginnotenabled', 'auth', 'shibboleth'));
 }
 
-// Back channel logout
-elseif (!empty($HTTP_RAW_POST_DATA)) {
+// Front channel logout.
+if ($action == 'logout' && !empty($redirect)) {
 
-    // Requires PHP 5
+    if ($USER->auth == 'shibboleth') {
+        // Logout out user from application.
+        require_logout();
+         // Finally, send user to the return URL.
+        redirect($redirect);
+    }
 
+} else if (!empty($HTTP_RAW_POST_DATA)) {
 
-    // Set SOAP header
+    // Back channel logout.
+    // Set SOAP header.
     $server = new SoapServer($protocol.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'/LogoutNotification.wsdl');
-
-
     $server->addFunction("LogoutNotification");
     $server->handle();
-}
 
-// Return WSDL
-else {
+} else {
 
+    // Return WSDL.
     header('Content-Type: text/xml');
 
     echo <<<WSDL
@@ -119,9 +115,7 @@
 </definitions>
 WSDL;
     exit;
-
 }
-
 /******************************************************************************/
 
 function LogoutNotification($SessionID){
371d58d70d4e

MDL-47964 auth_shibboleth: Fix DOS on the shibboleth logout

https://github.com/moodle/moodleSimey LamezeNov 11, 2014via ghsa
commit
1 file changed · +18 −24
  • auth/shibboleth/logout.php+18 −24 modified
    @@ -8,45 +8,41 @@
 
 require_once($CFG->dirroot."/auth/shibboleth/auth.php");
 
+$action = optional_param('action', '', PARAM_ALPHA);
+$redirect = optional_param('return', '', PARAM_URL);
 
 // Find out whether host supports https
 $protocol = 'http://';
 if ( isset($_SERVER['HTTPS']) && !empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on'){
     $protocol = 'https://';
 }
 
-// Front channel logout
-if (
-        isset($_GET['return'])
-        && isset($_GET['action'])
-        && $_GET['action'] == 'logout'
-   ){
-
-    // Logout out user from application
-    // E.g. destroy application session/cookie etc
-    require_logout();
-
-    // Finally, send user to the return URL
-    redirect($_GET['return']);
+// If the shibboleth plugin is not enable, throw an exception.
+if (!is_enabled_auth('shibboleth')) {
+    throw new moodle_exception(get_string('pluginnotenabled', 'auth', 'shibboleth'));
 }
 
-// Back channel logout
-elseif (!empty($HTTP_RAW_POST_DATA)) {
+// Front channel logout.
+if ($action == 'logout' && !empty($redirect)) {
 
-    // Requires PHP 5
+    if ($USER->auth == 'shibboleth') {
+        // Logout out user from application.
+        require_logout();
+         // Finally, send user to the return URL.
+        redirect($redirect);
+    }
 
+} else if (!empty($HTTP_RAW_POST_DATA)) {
 
-    // Set SOAP header
+    // Back channel logout.
+    // Set SOAP header.
     $server = new SoapServer($protocol.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'/LogoutNotification.wsdl');
-
-
     $server->addFunction("LogoutNotification");
     $server->handle();
-}
 
-// Return WSDL
-else {
+} else {
 
+    // Return WSDL.
     header('Content-Type: text/xml');
 
     echo <<<WSDL
@@ -119,9 +115,7 @@
 </definitions>
 WSDL;
     exit;
-
 }
-
 /******************************************************************************/
 
 function LogoutNotification($SessionID){

Vulnerability mechanics

Generated by null/stub on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.

References

8

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