A Cross-Site Request Forgery (CSRF) vulnerability has been discovered in Marco Milesi's ANAC XML Bandi di Gara software, a web-based solution utilized by government agencies and public administrations to manage, publish, and search for tender notices and contracts. This vulnerability affects the versions ranging from not available through 7.5. Due to this security flaw, attackers can potentially exploit the software and manipulate the bidding process without appropriate authorization.

Exploit Details

CVE ID: CVE-2023-47655

Affected Versions: ANAC XML Bandi di Gara (from n/a through 7.5)

Vulnerability Type: Cross-Site Request Forgery (CSRF)

Impact: Manipulation of bidding process, unauthorized actions

Risk Level: High

Original References: Marco Milesi's ANAC XML Bandi di Gara official website

Code Snippet

The code snippet below is an example of exploiting the CSRF vulnerability in ANAC XML Bandi di Gara. Through this malicious HTML file, using the POST method, the attacker could potentially submit an unauthorized bid on behalf of the victim.

<!DOCTYPE html>
    <h2>Malicious CSRF Exploit Example</h2>
    <form action="https://example.com/anac-xml-bandi/submit_bid.php"; method="POST">
      <input type="hidden" name="bidder_id" value="MALICIOUS_BIDDER_ID">
      <input type="hidden" name="tender_id" value="TENDER_ID">
      <input type="hidden" name="bid_amount" value="MALICIOUS_BID_AMOUNT">
      <input type="submit" value="Submit Bid">

This CSRF exploit can be sent to the victim as a phishing email, social engineering attack, or embedded in a malicious website. If the victim clicks the "Submit Bid" button, the unauthorized bid will be submitted to the ANAC XML Bandi di Gara system without their awareness.

Prevention and Mitigation Measures

To prevent this CSRF vulnerability in ANAC XML Bandi di Gara, developers need to implement CSRF tokens in the application. By incorporating unique CSRF tokens for each user session, the application can validate and ensure that the HTTP requests are generated from trusted and authorized sources only.

An example for generating a CSRF token in PHP

  // Generate CSRF token
  if (empty($_SESSION['token'])) {
    $_SESSION['token'] = bin2hex(random_bytes(32));
  $token = $_SESSION['token'];

And then, include the CSRF token in the form as a hidden input field

<form action="https://example.com/anac-xml-bandi/submit_bid.php"; method="POST">
  <input type="hidden" name="token" value="<?php echo $token; ?>">

In the server-side script, validate the CSRF token before processing the request

  if ($_POST['token'] != $_SESSION['token']) {
    die('Invalid CSRF token');
  // Process the request


The discovery of the CVE-2023-47655 CSRF vulnerability in Marco Milesi's ANAC XML Bandi di Gara serves as a reminder to the developers and administrators of the importance of integrating security measures into their software and web applications. Implementing CSRF tokens, monitoring web traffic, and regularly performing security audits can help protect the system from possible exploitation.


Published on: 11/18/2023 22:15:09 UTC
Last modified on: 11/27/2023 20:33:58 UTC