Corrected vulnerabilities (see report below)

Title : Shaarli Vulnerabilities
Author : @erwan_lr | @_WPScan_

Vendor : http://sebsauvage.net/wiki/doku.php?id=php:shaarli
Download : https://github.com/sebsauvage/Shaarli/archive/master.zip |
http://sebsauvage.net/files/shaarli_0.0.40beta.zip
Affected versions : master-705F835, 0.0.40-beta (versions below may also
be vulnerable)

Vulnerabilities : Persistent XSS & Unvalidated Redirects and Forwards

Persistent XSS :
- During the instalation or configuration modification, the title field
is vulnerable. e.g <script>alert(1)</script>
Quotes can not be used because of var_export(), but String.fromCharCode
works

- The url field of a link is vulnerable :

When there is no redirector : javascript:alert(1)
Then, the code is triggered when a user click the url of a link

Or with a classic XSS : "><script>alert(1)</script>

Unvalidated Redirects and Forwards :
A request with the param linksperpage or privateonly can be used to
redirect a user to an arbitrary referer

e.g
GET /Audit/Shaarli/master-705f835/?linksperpage=10 HTTP/1.1
Host: 127.0.0.1
Referer: https://duckduckgo.com

History :
March 2, 2013
- Vendor contacted

2 files changed, 2 insertions, 2 deletions

diff --git a/tpl/linklist.html b/tpl/linklist.html
index 3a703512..37ffeb64 100644
--- a/tpl/linklist.html
+++ b/tpl/linklist.html
@@ -40,7 +40,7 @@
                         <input type="hidden" name="token" value="{$token}"><input type="hidden" name="delete_link"><input type="image" alt="Delete" src="images/delete_icon.png#" title="Delete" class="button_delete" onClick="return confirmDeleteLink();"></form>
                     </div>
                 {/if}
-                <span class="linktitle"><a href="{$redirector}{$value.url}">{$value.title|htmlspecialchars}</a></span>
+                <span class="linktitle"><a href="{$redirector}{$value.url|htmlspecialchars}">{$value.title|htmlspecialchars}</a></span>
                 <br>
                 {if="$value.description"}<div class="linkdescription"{if condition="$search_type=='permalink'"} style="max-height:none !important;"{/if}>{$value.description}</div>{/if}
                 {if="!$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn()"}
diff --git a/tpl/page.header.html b/tpl/page.header.html
index 60fc1767..125b365b 100644
--- a/tpl/page.header.html
+++ b/tpl/page.header.html
@@ -2,7 +2,7 @@
     <div id="logo" title="Share your links !" onclick="document.location='?';"></div>
     <div style="float:right; font-style:italic; color:#bbb; text-align:right; padding:0 5 0 0;" class="nomobile">Shaare your links...<br>
         {if="!empty($linkcount)"}{$linkcount} links{/if}</div>
-    <span id="shaarli_title"><a href="?">{$shaarlititle}</a></span>
+    <span id="shaarli_title"><a href="?">{$shaarlititle|htmlspecialchars}</a></span>
   
 {if="!empty($_GET['source']) && $_GET['source']=='bookmarklet'"}
     {ignore} When called as a popup from bookmarklet, do not display menu. {/ignore}