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First blog I Made about Reflected XSS😉 Reflected XSS is a serious threat that can lead to significant harm if left unaddressed. This real-world example from iPrice highlights the importance of thorough input validation and output encoding in web applications. Protecting users from such vulnerabilities is not just a technical necessity. It's a vital part of maintaining the trust and security that users expect from online platforms. As developers, it's our responsibility to ensure that our applications are secure from such threats. Regular security audits, using tools and scripts to check for vulnerabilities, can help in identifying and fixing these issues before they can be exploited by malicious actors. Next topic will be about SQL Injection with real website I found in past few weeks! #xss #reflectedxss #dansday

𝗗𝗮𝘆 𝟮𝟰 𝗼𝗳 𝟯𝟬 𝗗𝗮𝘆𝘀 - 𝟯𝟬 𝗩𝘂𝗹𝗻𝗲𝗿𝗮𝗯𝗶𝗹𝗶𝘁𝗶𝗲𝘀 𝗠𝗮𝘀𝘁𝗲𝗿𝗶𝗻𝗴 𝗪𝗲𝗯 𝗖𝗮𝗰𝗵𝗲 𝗣𝗼𝗶𝘀𝗼𝗻𝗶𝗻𝗴 𝗩𝘂𝗹𝗻𝗲𝗿𝗮𝗯𝗶𝗹𝗶𝘁𝘆 - Essential Tricks & Techniques based on Personal Experience and Valuable Blogs & POCs. 𝟭. 𝗪𝗵𝗲𝗿𝗲 𝘁𝗼 𝗗𝗲𝘁𝗲𝗰𝘁: 𝗖𝗮𝗰𝗵𝗲-𝗖𝗼𝗻𝘁𝗿𝗼𝗹 𝗠𝗲𝗰𝗵𝗮𝗻𝗶𝘀𝗺𝘀: Examine cache-control headers for misconfigurations. 𝗨𝗥𝗟 𝗣𝗮𝗿𝗮𝗺𝗲𝘁𝗲𝗿𝘀: Inspect unsanitized inputs that could be used in poisoning attacks. 𝗛𝗧𝗧𝗣 𝗥𝗲𝘀𝗽𝗼𝗻𝘀𝗲 𝗛𝗲𝗮𝗱𝗲𝗿𝘀: Ensure headers don’t expose user inputs or vulnerable parameters. 𝟮. 𝗛𝗼𝘄 𝘁𝗼 𝗗𝗲𝘁𝗲𝗰𝘁: 𝗠𝗮𝗻𝘂𝗮𝗹 𝗧𝗲𝘀𝘁𝗶𝗻𝗴: Craft requests to test cache behavior with modified headers or parameters. 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗲𝗱 𝗧𝗼𝗼𝗹𝘀: Use Burp Suite or OWASP ZAP to identify vulnerable points. 𝗖𝗮𝗰𝗵𝗲 𝗧𝗶𝗺𝗶𝗻𝗴 𝗔𝗻𝗮𝗹𝘆𝘀𝗶𝘀: Measure response times for identical requests to detect cache poisoning. 𝟯. 𝗕𝗮𝘀𝗶𝗰 & 𝗔𝗱𝘃𝗮𝗻𝗰𝗲𝗱 𝗣𝗮𝘆𝗹𝗼𝗮𝗱𝘀: 𝗕𝗮𝘀𝗶𝗰: Manipulate cache-control headers or inject parameters to poison the cache. 𝗔𝗱𝘃𝗮𝗻𝗰𝗲𝗱: Use Host or X-Forwarded-Host header injection to insert malicious content. 𝟰. 𝗗𝗲𝗳𝗲𝗻𝘀𝗲 𝗕𝘆𝗽𝗮𝘀𝘀 𝗧𝗲𝗰𝗵𝗻𝗶𝗾𝘂𝗲𝘀: 𝗛𝗲𝗮𝗱𝗲𝗿 𝗠𝗮𝗻𝗶𝗽𝘂𝗹𝗮𝘁𝗶𝗼𝗻: Bypass weak cache configurations by altering Host or Vary headers. 𝗜𝗻𝗽𝘂𝘁 𝗠𝗮𝗻𝗶𝗽𝘂𝗹𝗮𝘁𝗶𝗼𝗻: Exploit unsanitized inputs in URLs to store and serve malicious content. 𝗖𝗮𝗰𝗵𝗲-𝗖𝗼𝗻𝘁𝗿𝗼𝗹 𝗘𝘃𝗮𝘀𝗶𝗼𝗻: Use unconventional headers to trick the cache into storing harmful content. 𝗣𝗢𝗖 𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁𝘀: 𝗣𝗢𝗖 𝟭: 𝗛𝗼𝘀𝘁 𝗛𝗲𝗮𝗱𝗲𝗿 𝗜𝗻𝗷𝗲𝗰𝘁𝗶𝗼𝗻 𝗘𝘅𝗽𝗹𝗼𝗶𝘁: Manipulate Host header to inject and store a malicious response. 𝗜𝗺𝗽𝗮𝗰𝘁: Serve poisoned content to users, leading to unauthorized access. 𝗣𝗢𝗖 𝟮: 𝗩𝗮𝗿𝘆 𝗛𝗲𝗮𝗱𝗲𝗿 𝗔𝗯𝘂𝘀𝗲 𝗘𝘅𝗽𝗹𝗼𝗶𝘁: Modify Vary header to cache malicious responses for specific users. 𝗜𝗺𝗽𝗮𝗰𝘁: Users receive altered or harmful content. 𝗣𝗢𝗖 𝟯: 𝗫-𝗙𝗼𝗿𝘄𝗮𝗿𝗱𝗲𝗱-𝗛𝗼𝘀𝘁 𝗛𝗲𝗮𝗱𝗲𝗿 𝗔𝘁𝘁𝗮𝗰𝗸 𝗘𝘅𝗽𝗹𝗼𝗶𝘁: Poison the cache by injecting content through the X-Forwarded-Host header. 𝗜𝗺𝗽𝗮𝗰𝘁: Cross-domain attacks and unauthorized file access. 𝗡𝗼𝘁𝗲: Due to the presence of harmful payloads, the full blog with POCs is available on Medium. For detailed explanations & POCs, I strongly recommend reading the full blog post on Web Cache Poisoning: https://lnkd.in/gUCZy2hf Follow me on Twitter: https://lnkd.in/gv9EPsD3 Follow me on Medium: https://lnkd.in/gE7pgY-U

Understanding data leakage and its consequences is fundamental for anyone who manages or operates a website. However, to effectively combat this issue and prevent data leakage, it's essential to go through the mechanics behind this cybersecurity practice that involves implementing secure data practices to reduce accidental exposure. ⚙️🕵️♂️ In this week's blog post, let's learn: 👉 Why Do Websites Leak Data? 🔹But how can attackers exploit this vulnerability? 🔹The Web Supply Chain and Data Leakage 👉 Protecting the Web Supply Chain and Preventing Data Leakage Read it now at Jscrambler's Blog https://lnkd.in/dZN6th5V 📖 #DataLeakage #DataLeakagePrevention #Cybersecurity #Security #Jscrambler #ClientSideProtection #ClientSideSecurity #AppSec

Stay Ahead of Security Threats! Discover the critical details about the polyfill supply chain attack below. Learn how immediate actions, like removing references to polyfill.io in your code, can prevent potential breaches. On June 27th, Sansec updated the disclosure and said: “Cloudflare has implemented real-time rewrites of cdn.polyfill.io to their own version. A little later, Namecheap has put the domain on hold altogether, which eliminates the risk for now. However, you are still recommended to remove any polyfill.io references in your code.” Read our full analysis and expert recommendations here: 🔗 https://bit.ly/3RRCs15

What is HTTP Request Smuggling and HTTP/2 Downgrading?: Have you heard of the term HTTP Request Smuggling? What about HTTP/2 Downgrading? Well, these are vulnerabilities that can be exploited by cybercriminals when there are issues between the front-end and back-end of websites. If left unresolved, these can result in some very dire consequences for any business. The IT Security Guru chatted with Love […] The post What is HTTP Request Smuggling and HTTP/2 Downgrading? first appeared on IT Security Guru. The post What is HTTP Request Smuggling and HTTP/2 Downgrading? appeared first on IT Security Guru.

In the ever-changing world of technology, web applications are essential to our everyday existence. However, because of their extensive use, cyberattackers find them appealing targets. Developers, security experts, and consumers need to comprehend the risks that web applications encounter. In this thorough investigation, we will examine the top ten web application security threats and vulnerabilities in-depth, highlighting potential dangers and providing suggestions for reducing them. https://lnkd.in/gS6Xz4df #webapplication #digitalrevolution #webdevelopment #websecurity #webdevelopmentcompany #hexadesigns

🚨Security Alert: Millions of Websites Vulnerable to XSS Attacks🚨 Salt Labs has uncovered a major cross-site scripting (XSS) vulnerability affecting millions of websites through improper OAuth implementation used for social logins. This issue can lead to account takeovers and data breaches, highlighting a significant security gap. Key Points: - Vulnerability: Improper OAuth implementation can bypass current XSS mitigations. - Risk: Millions of websites, including major firms like HotJar and Business Insider, are at risk. - Attack Mechanism: Combines XSS with OAuth’s social-login feature to steal credentials. - Mitigation: Developers should focus on input sanitization, using modern web frameworks, HTTP-Only cookies, and Content Security Policies (CSP). Mitigation Steps: 1. Sanitize Inputs and Encode Outputs: Prevent execution of malicious code. 2. Use Modern Frameworks: React and Angular offer built-in XSS protections. 3. HTTP-Only Cookies: Enhance security by preventing script access to cookies. 4. Content Security Policy (CSP): Block unauthorized scripts and content. Salt Labs offers a free scanner for websites to check their OAuth implementations. Stay vigilant and secure your sites! Source🔗: https://lnkd.in/d7CARDFV #CyberSecurity #XSS #OAuth #WebSecurity #DataProtection

Web applications are susceptible to various vulnerabilities that can be exploited by attackers to compromise their security. Here are 15 common vulnerabilities in web applications:

Directory traversal, also known as path traversal , is a security vulnerability that occurs when an application allows an attacker to navigate outside of the intended directory structure with“dot-dot-slash (../)” sequences or similar constructs. This can lead to unauthorized access to files and directories. Basic exploitation: ../ ..\ %2e%2e%2f %252e%252e%252f(Double URL encoding) %c0%ae%c0%ae%c0%af(UTF-8 Unicode encoding) Sometimes you encounter a WAF which remove the ../ characters from the strings. You can bypass this by just duplicating them: ..././ ...\.\ For exemple: "/loadImage?filename=../../../etc/passwd" To prevent directory traversal attacks, it's important to validate and sanitize user input and carefully control the access to files and directories. Here are some general tips to prevent directory traversal vulnerabilities: Input Validation: -Validate and sanitize all user inputs, especially those related to file paths. -Use a whitelist approach to allow only known and expected input. File Path Canonicalization: -Canonicalize (normalize) file paths before using them. This helps to ensure that the paths are in a consistent format and prevents the use of special characters and encoding tricks. Restrict Access: -Apply the principle of least privilege. Ensure that the web server or application has the minimum required permissions to access files and directories. Web Application Firewalls (WAF): -Use a WAF that can detect and block directory traversal attempts.

Learn about the intricacies of XSS, its types, and how to prevent attacks to enhance web application security. Improve search engine visibility with a detailed and informative title.