AI Builds, We Secure

Penetration testing and source code review for AI-generated applications. From Cursor to v0, we find the vulnerabilities that AI creates.

50+

Security Audits

3.5 Avg.

Critical Findings per App

0

Critical Findings in Retest

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Trusted across industries

"We found KleoSEC to be the right tool to ensure every iteration of our API remained secure. It integrated seamlessly into our deployment pipeline and became a natural part of our release process."— Karlo Gašpar CTO, Parklio d.o.o.
"I think the training is really at a high level, especially regarding the various tools we were introduced to and the techniques of hacking and social engineering."— Participant, Social Engineering Education
"The instructor was excellent; everything was clear and concise. I would gladly attend future lectures again."— Ana, Secure Digital Transformation Education
"I am very satisfied with how the project turned out. The entire training and learning process, especially working with OSINT tools, was very engaging and insightful."— Participant, Social Engineering Education
"Following the conducted pentest and phishing campaign, the team demonstrated a high level of expertise, responsibility, and professionalism. The activities were carried out thoroughly and discreetly, in line with the best practices in information security, with clear and actionable recommendations for improvement. This serves as an excellent example of successfully delivered work and a valuable contribution to strengthening the faculty's security culture."— Branimir Lela, Dean at FESB
"We found KleoSEC to be the right tool to ensure every iteration of our API remained secure. It integrated seamlessly into our deployment pipeline and became a natural part of our release process."— Karlo Gašpar CTO, Parklio d.o.o.
"I think the training is really at a high level, especially regarding the various tools we were introduced to and the techniques of hacking and social engineering."— Participant, Social Engineering Education
"The instructor was excellent; everything was clear and concise. I would gladly attend future lectures again."— Ana, Secure Digital Transformation Education
"I am very satisfied with how the project turned out. The entire training and learning process, especially working with OSINT tools, was very engaging and insightful."— Participant, Social Engineering Education
"Following the conducted pentest and phishing campaign, the team demonstrated a high level of expertise, responsibility, and professionalism. The activities were carried out thoroughly and discreetly, in line with the best practices in information security, with clear and actionable recommendations for improvement. This serves as an excellent example of successfully delivered work and a valuable contribution to strengthening the faculty's security culture."— Branimir Lela, Dean at FESB
"We found KleoSEC to be the right tool to ensure every iteration of our API remained secure. It integrated seamlessly into our deployment pipeline and became a natural part of our release process."— Karlo Gašpar CTO, Parklio d.o.o.
"I think the training is really at a high level, especially regarding the various tools we were introduced to and the techniques of hacking and social engineering."— Participant, Social Engineering Education
"The instructor was excellent; everything was clear and concise. I would gladly attend future lectures again."— Ana, Secure Digital Transformation Education
"I am very satisfied with how the project turned out. The entire training and learning process, especially working with OSINT tools, was very engaging and insightful."— Participant, Social Engineering Education
"Following the conducted pentest and phishing campaign, the team demonstrated a high level of expertise, responsibility, and professionalism. The activities were carried out thoroughly and discreetly, in line with the best practices in information security, with clear and actionable recommendations for improvement. This serves as an excellent example of successfully delivered work and a valuable contribution to strengthening the faculty's security culture."— Branimir Lela, Dean at FESB
"We found KleoSEC to be the right tool to ensure every iteration of our API remained secure. It integrated seamlessly into our deployment pipeline and became a natural part of our release process."— Karlo Gašpar CTO, Parklio d.o.o.
"I think the training is really at a high level, especially regarding the various tools we were introduced to and the techniques of hacking and social engineering."— Participant, Social Engineering Education
"The instructor was excellent; everything was clear and concise. I would gladly attend future lectures again."— Ana, Secure Digital Transformation Education
"I am very satisfied with how the project turned out. The entire training and learning process, especially working with OSINT tools, was very engaging and insightful."— Participant, Social Engineering Education
"Following the conducted pentest and phishing campaign, the team demonstrated a high level of expertise, responsibility, and professionalism. The activities were carried out thoroughly and discreetly, in line with the best practices in information security, with clear and actionable recommendations for improvement. This serves as an excellent example of successfully delivered work and a valuable contribution to strengthening the faculty's security culture."— Branimir Lela, Dean at FESB
Our Services

Security expertise for modern applications

FEATURED01

AI-Generated Code Audits

Vibe Code Security

Deep security reviews for applications built with Cursor, v0, Bolt, and other AI coding tools. We identify the vulnerabilities AI introduces before they reach production.

Manual exploitation
Authentication and logic flaws
Dependencies and misconfigurations
1-2 weeksLearn More →
Ethical Hacking02

Offensive Security

Adversary-style testing using manual exploitation, custom tooling, and chained attack paths to demonstrate real business impact - not just automated scanner findings.

Web · API Security · Network & Infrastructure Assessment
1-3 weeks
+4 more
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Featured Case Study
Security Audit Report

Security Audit of a Fully AI-Generated Web Application

Vibe-Coded Startup

SAMPLE
CRITICAL
Privileges escalation
CRITICAL
SQL injection
MEDIUM
File upload misconfiguration
12 findings5 critical2 wk
AC

"TBA"

— Anonymous COO, Vibe-Coded Startup

Security Audit of a Fully AI-Generated Web Application

A fast-moving startup built their entire MVP using AI coding assistants (Cursor, v0, Claude). Before launch, they needed assurance their AI-generated code was secure. This was one of the first dedicated vibe-code security audits.

Our Approach

AI-specific vulnerability pattern analysis
Source code review focusing on AI-generated antipatterns
Authentication and authorization deep-dive
Data handling and injection vulnerability assessment
File upload vulnerability assessment
Assessment of used cryptography mechanisms
Read Full Case Study
Free Resource

See exactly what
you'll receive.

Download our sample penetration test report. 45 pages of detailed findings, risk assessments, and remediation guidance.

20+

Pages

3

Sample Findings

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Get a free 30-minute consultation to discuss your security needs. No sales pitch, just honest advice from security engineers.

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Why KleoSEC

Security That Keeps Pace With AI Development

Vibe Code Experts

First security firm specialized in auditing AI-generated code. We understand the patterns, shortcuts, and blind spots that AI introduces.

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