Kelyan Yesil

Penetration Tester

Junior penetration tester with a strong interest in ethical hacking, hardware hacking, network security, and cloud computing.

Kelyan Yesil

Junior penetration tester with a strong interest in ethical hacking, hardware hacking, network security, and cloud computing.

Posts by this author

Breaking down the 5 most common SQL injection threats
In this ongoing battle, organizations and offensive security pros grapple with many questions: Why do these attacks persist? What are the most prevalent types of SQL injection attacks? And, most importantly, how do we prevent them effectively? You’ll get answers to these burning questions (and more!) in this practical guide.
SS
Author(s)
Satyam Singh,
Kelyan Yesil
Published at
01 Sep 2023
Updated at
16 Nov 2023
Why this 14-year-old heap corruption vulnerability in MS Word is still relevant
A critical vulnerability with Remote Code Execution (RCE) potential in Microsoft Word (CVE-2023-21716) with a CVSS score of 9.8 was among the Zero-Day vulnerabilities that were fixed.
Author(s)
Kelyan Yesil
Published at
18 Apr 2023
Updated at
28 Nov 2023
Log4J - why some CVEs (almost) never disappear
Unless you’ve been on a sabbatical for the past year, you probably know how a critical vulnerability known as Log4shell took over the world.
Author(s)
Kelyan Yesil
Published at
07 Apr 2023
Updated at
12 Jul 2023
The most exploited vulnerabilities in 2022
Offensive security is a fast-moving space, yet some security vulnerabilities persist for years, causing problem after problem. 2023 being no exception, you can spare yourself from repetitive work by learning to find and mitigate these top 10 CVEs.
Author(s)
Kelyan Yesil
Published at
16 Mar 2023
Updated at
31 Oct 2023
Phishing a company through a 7-Zip misconfiguration
Reading about phishing can sometimes feel tedious, as many articles simply rehash the same old scenarios and prevention strategies without diving into technical details or offering anything fresh. But don't worry, we've got you covered!
Author(s)
Kelyan Yesil
Published at
19 Jan 2023
Updated at
13 Apr 2023
How the DMARC email security protocol can take down an entire company
Get familiar with DMARC, a less-known email security protocol that can help businesses prevent phishing campaigns.
Author(s)
Kelyan Yesil
Published at
13 Dec 2022
Updated at
10 Apr 2023
Everything you need to know about the new OpenSSL vulnerabilities (CVE-2022-3602 & CVE-2022-3786)
Before securing systems, we need to understand what we’re trying to secure and how to do it. Today we are exploring two new vulnerabilities that got the community's attention this month. Most importantly you will learn how to patch them and how impactful they are.
Author(s)
Kelyan Yesil
Published at
18 Nov 2022
Updated at
18 Jul 2023