Most of user defined data in Vanilla Guestbook 1.0 beta is not properly sanitized leading to SQL injection and XSS problems.
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New eVuln Advisory:
Vanilla Guestbook Multiple XSS & SQL Injection Vulnerabilities
https://evuln.com/vulns/54/summary.html
--------------------Summary----------------
Software: Vanilla Guestbook
Sowtware's Web Site: https://tachyondecay.net/
Versions: 1.0 Beta
Critical Level: Moderate
Type: Multiple Vulnerabilities
Class: Remote
Status: Unpatched
Exploit: Not Available
Solution: Not Available
Discovered by: Aliaksandr Hartsuyeu (eVuln.com)
eVuln ID: EV0054
-----------------Description---------------
Most of user defined data isn't properly sanitized. This can be used to make any SQL query by injecting arbitrary SQL code or insert any javascript code (when posting new messages).
--------------Exploit----------------------
Waiting for developer(s) reply.
If there is no reply exploitation code will be published in 10 days
https://evuln.com/vulns/54/exploit.html
--------------Solution---------------------
No Patch available.
--------------Credit-----------------------
Discovered by: Aliaksandr Hartsuyeu (eVuln.com)