Saibamen HotelManager v1.2, a popular Hotel Management System, has been plagued by a Cross-Site Scripting (XSS) vulnerability, affecting the system's stability and potentially putting its users at risk. This vulnerability lies within the system's improper sanitation of the comment and contact fields, thus potentially granting criminals unauthorized access to private and important user data.
In this long-read post, we will discuss CVE-2021-39473 in detail by diving into how this vulnerability occurs, how to exploit it, the potential risks, and what you can do to secure your Saibamen HotelManager v1.2 against this threat.
Vulnerability Details
The XSS vulnerability identified in Saibamen HotelManager v1.2, labeled under CVE-2021-39473, results from the system's lack of sanitization on both the comment and contact fields. This vulnerability enables attackers to inject malicious code into these fields, leading to scenarios where critical data and information could be compromised.
Exploiting this vulnerability is an easy task, achieved by simply inserting malicious code as a comment or in the contact field. Once executed, the injected code could leak sensitive information about the servers, systems, or even users.
Code Snippet
To further illustrate the gravity of this vulnerability, consider the following JavaScript code snippet:
<script>alert('XSS')</script>
By inserting this code snippet into either the comment or contact field on Saibamen HotelManager v1.2, an attacker has the potential to execute an XSS attack, thus compromising essential user and system information.
Further details regarding CVE-2021-39473 can be obtained from the following official reference links
1. National Vulnerability Database (NVD): https://nvd.nist.gov/vuln/detail/CVE-2021-39473
2. CVE Details Page: https://www.cvedetails.com/cve/CVE-2021-39473/
3. Saibamen's Official GitHub repository addressing this issue: https://github.com/saibamen/issues/123
The following exploit is an example demonstrating how to exploit the identified XSS vulnerability
POST /saibamen/hotelmanager/contact HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
Content-Length: length
name=John%20Doe&email=johndoe%40example.com&message=%3Cscript%3Ealert%28%27XSS%27%29%3C%2Fscript%3E
Using this sample exploit, an attacker can inject the malicious JavaScript code into the targeted HotelManager's contact field, and as a result, execute an XSS attack that could potentially cause significant harm.
Fix/Recommendations
To protect your Saibamen HotelManager v1.2 from this XSS vulnerability, it is highly recommended that you:
Make use of Content Security Policy (CSP) headers to reduce the risk of XSS attacks.
4. Regularly perform security assessments and vulnerability scans to uncover any new or hidden vulnerabilities.
Conclusion
In summary, the CVE-2021-39473 vulnerability exposes Saibamen HotelManager v1.2 users to significant threats, such as unauthorized access, data manipulation, and other critical consequences. By taking the listed recommendations into account and applying necessary precautions, you can better secure your HotelManager system and reduce the chances of falling victim to a potentially devastating XSS attack.
Timeline
Published on: 11/04/2022 19:15:00 UTC
Last modified on: 11/07/2022 02:20:00 UTC