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Preview : Web App Hacker's Handbook 2nd Edition ! The first draft of the new edition of WAHH is now completed, and the lengthy editing and production process is underway. Just to whet everyone's appetite, I'm posting below an exclusive extract from the Introduction, describing what has changed in the second edition. (And in a vain attempt to quell the tidal wave of questions: the book will be published in October; there won't be any more extracts; we don't need any proof readers, thanks.) What's Changed in the Second Edition? In the four years since the first edition of this book was published, much has changed and much has stayed the same. The march of new technology has, of course, continued apace, and this has given rise to specific new vulnerabilities and attacks. The ingenuity of hackers has also led to the development of new attack techniques, and new ways of exploiting old bugs. But neither of these factors, technological or human, has created a rev...

This past week has been packed with unsettling developments in the world of cybersecurity. From silent but serious attacks on popular business tools to unexpected flaws lurking in everyday devices, there's a lot that might have flown under your radar. Attackers are adapting old tricks, uncovering new ones, and targeting systems both large and small. Meanwhile, law enforcement has scored wins against some shady online marketplaces, and technology giants are racing to patch problems before they become a full-blown crisis. If you've been too busy to keep track, now is the perfect time to catch up on what you may have missed. ⚡ Threat of the Week Cleo Vulnerability Comes Under Active Exploitation — A critical vulnerability (CVE-2024-50623) in Cleo's file transfer software—Harmony, VLTrader, and LexiCom—has been actively exploited by cybercriminals , creating major security risks for organizations worldwide. The flaw enables attackers to execute code remotely without authorization...

Recently uncovered two huge processor vulnerabilities called Meltdown and Spectre have taken the whole world by storm, while vendors are rushing out to patch the vulnerabilities in its products. The issues apply to all modern processors and affect nearly all operating systems (Windows, Linux, Android, iOS, macOS, FreeBSD, and more), smartphones and other computing devices made in the past 20 years. What are Spectre and Meltdown? We have explained both , Meltdown (CVE-2017-5754) and Spectre (CVE-2017-5753, CVE-2017-5715), exploitation techniques in our previous article. In short, Spectre and Meltdown are the names of security vulnerabilities found in many processors from Intel, ARM and AMD that could allow attackers to steal your passwords, encryption keys and other private information. Both attacks abuse 'speculative execution' to access privileged memory—including those allocated for the kernel—from a low privileged user process like a malicious app running on a...

Attackers aren't waiting for patches anymore — they are breaking in before defenses are ready. Trusted security tools are being hijacked to deliver malware. Even after a breach is detected and patched, some attackers stay hidden. This week's events show a hard truth: it's not enough to react after an attack. You have to assume that any system you trust today could fail tomorrow. In a world where AI tools can be used against you and ransomware hits faster than ever, real protection means planning for things to go wrong — and still staying in control. Check out this week's update to find important threat news, helpful webinars, useful tools, and tips you can start using right away. ⚡ Threat of the Week Windows 0-Day Exploited for Ransomware Attacks — A security affecting the Windows Common Log File System (CLFS) was exploited as a zero-day in ransomware attacks aimed at a small number of targets, Microsoft revealed. The flaw, CVE-2025-29824, is a privilege escalation vulnerabilit...

Microsoft has patched a total of  74 flaws  in its software as part of the company's Patch Tuesday updates for August 2023, down from the voluminous 132 vulnerabilities the company fixed last month. This comprises six Critical, 67 Important, and one Moderate severity vulnerabilities. Released along with the security improvements are two defense-in-depth updates for Microsoft Office ( ADV230003 ) and the Memory Integrity System Readiness Scan Tool ( ADV230004 ). The updates are also in addition to 30 issues addressed by Microsoft in its Chromium-based Edge browser since last month's Patch Tuesday edition and one side-channel flaw impacting certain processor models offered by AMD ( CVE-2023-20569  or  Inception ). ADV230003 concerns an already known security flaw tracked as  CVE-2023-36884 , a remote code execution vulnerability in Office and Windows HTML that has been actively exploited by the Russia-linked RomCom threat actor in attacks targeting Ukraine as...

Python has its pros and cons, but it's nonetheless used extensively. For example, Python is frequently used in data crunching tasks even when there are more appropriate languages to choose from. Why? Well, Python is relatively easy to learn. Someone with a science background can pick up Python much more quickly than, say, C. However, Python's inherent approachability also creates a couple of problems. Whenever Python is updated, it means a big refactoring workload, which often gets dealt with poorly – or not at all. That leads to poor performance and security vulnerabilities. But maybe there is a better way: a tool to keep your Python tasks running smoothly and securely day in, day out. Let's take a look. It's slow, but it does the job Python isn't the fastest language around, but despite its comparative disadvantages, you'll often see it used for intensive data crunching operations. Think machine learning, computer vision, or even pure math in high-perform...

Not every risk looks like an attack. Some problems start as small glitches, strange logs, or quiet delays that don't seem urgent—until they are. What if your environment is already being tested, just not in ways you expected? Some of the most dangerous moves are hidden in plain sight. It's worth asking: what patterns are we missing, and what signals are we ignoring because they don't match old playbooks? This week's reports bring those quiet signals into focus—from attacks that bypassed MFA using trusted tools, to supply chain compromises hiding behind everyday interfaces. Here's what stood out across the cybersecurity landscape: ⚡ Threat of the Week Cloudflare Blocks Massive 7.3 Tbps DDoS Attack — Cloudflare said it autonomously blocked the largest distributed denial-of-service (DDoS) attack ever recorded, which hit a peak of 7.3 terabits per second (Tbps). The attack, the company said, targeted an unnamed hosting provider and delivered 37.4 terabytes in 45 seconds. It origi...

5G is a game changer for mobile connectivity, including mobile connectivity to the cloud. The technology provides high speed and low latency when connecting smartphones and IoT devices to cloud infrastructure. 5G networks are a critical part of all infrastructure layers between the end user and the end service; these networks transmit sensitive data that can be vital for governments and businesses, not to mention individuals. As a result, 5G networks are a prime target for attackers. For this reason, cybersecurity has been a key consideration in developing the 5G standard. 5G encompasses robust security features that guarantee confidentiality, integrity, and availability of network services and user data. In this article, Seva Vayner, Product Owner of  Gcore's Edge Cloud service , gives a deep dive into five of 5 G's cutting-edge security measures. He also delves into the pivotal performance capabilities of 5G, accompanied by use cases that demonstrate how contemporary, cloud...

Microsoft released its final set of Patch Tuesday updates for 2023, closing out 34 flaws in its software, making it one of the lightest releases in recent years. Of the 34 shortcomings, four are rated Critical and 30 are rated Important in severity. The fixes are in addition to  18 flaws  Microsoft addressed in its Chromium-based Edge browser since the release of  Patch Tuesday updates for November 2023 . According to data from the  Zero Day Initiative , the software giant has patched more than 900 flaws this year, making it one of the busiest years for Microsoft patches. For comparison, Redmond resolved 917 CVEs in 2022. While none of the vulnerabilities are listed as publicly known or under active attack at the time of release, some of the notable ones are listed below - CVE-2023-35628  (CVSS score: 8.1) - Windows MSHTML Platform Remote Code Execution Vulnerability CVE-2023-35630  (CVSS score: 8.8) - Internet Connection Sharing (ICS) Remote Code E...