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vendor:
Chipmunk Guestbook
by:
7.5
CVSS
HIGH
HTML Injection
79
CWE
Product Name: Chipmunk Guestbook
Affected Version From:
Affected Version To:
Patch Exists: NO
Related CWE:
CPE: a:chipmunk_guestbook
Metasploit:
Other Scripts:
Platforms Tested:

HTML Injection Vulnerability in Chipmunk Guestbook

Chipmunk Guestbook is prone to an HTML injection vulnerability. This issue is due to a failure in the application to properly sanitize user-supplied input before using it in dynamically generated content. Attacker-supplied HTML and script code would be executed in the context of the affected Web site, potentially allowing for theft of cookie-based authentication credentials. An attacker could also exploit this issue to control how the site is rendered to the user; other attacks are also possible.

Mitigation:

To mitigate this vulnerability, it is recommended to sanitize and validate user input before using it in dynamically generated content. Implementing proper input validation and output encoding can help prevent HTML injection attacks.
Source

Exploit-DB raw data:

source: https://www.securityfocus.com/bid/16112/info

Chipmunk Guestbook is prone to an HTML injection vulnerability. This issue is due to a failure in the application to properly sanitize user-supplied input before using it in dynamically generated content.

Attacker-supplied HTML and script code would be executed in the context of the affected Web site, potentially allowing for theft of cookie-based authentication credentials. An attacker could also exploit this issue to control how the site is rendered to the user; other attacks are also possible. 

Add an entry form:
http://www.example.com/guestbook/addentry.php

Homepage value: '></a><script>alert(123);</script>

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