WordPress Newsletter Plugin 3.2.6 (alert) Reflected XSS Vulnerability

2013.05.15
Risk: Low
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-79

Wordpress Newsletter Plugin 3.2.6 (alert) Reflected XSS Vulnerability Vendor: Stefano Lissa Product web page: http://wordpress.org/extend/plugins/newsletter/ Affected version: 3.2.6 and bellow Summary: Newsletter is the perfect WordPress plugin for creating real newsletters and mail marketing system on your WordPress blog. Desc: The plugin suffers from a XSS issue due to a failure to properly sanitize user-supplied input to the 'alert' GET parameter in the 'page.php' script. Attackers can exploit this weakness to execute arbitrary HTML and script code in a user's browser session. ======================================================================= /subscription/page.php: ----------------------- 70: <?php if (!empty($alert)) { ?> 71: <script> 72: alert("<?php echo addslashes($alert); ?>"); 73: </script> 74: <?php } ?> ======================================================================= Tested on: Microsoft Windows 7 Ultimate SP1 (EN) Apache 2.4.2 (Win32) PHP 5.4.7 MySQL 5.5.25a Vulnerability discovered by Gjoko 'LiquidWorm' Krstic @zeroscience Advisory ID: ZSL-2013-5141 Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5141.php 09.05.2013 -- http://10.0.55.5/wordpress/wp-content/plugins/newsletter/subscription/page.php?alert=</script><script>alert(/ZSL/);</script>

References:

http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5141.php


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