Practical Security Guides For Your Team

Your website uses an outdated version of a popular form validation tool (jQuery Validation) that has a known security flaw. An attacker who can influence the text shown in form error messages could inject malicious code that runs in your visitors' browsers. This is a medium-severity issue — it requires a specific set of conditions to exploit, but the fix is straightforward.

Your application uses a popular JavaScript utility library called Lodash. A security flaw in versions up to 4.17.x means that if any part of your app passes user-supplied data into a specific templating feature, an attacker could run their own code on your server. This is a bypass of a previous fix — the library patched one door but left another one open.

Your website uses a popular library called DOMPurify to clean up user-submitted content before displaying it — think of it like a filter that removes dangerous code. A flaw in certain versions of this library means the filter has a few gaps: attackers who know about these gaps can sneak malicious scripts through, but only when the cleaned content is placed inside specific, less-common page sections. A patch is available and the fix is straightforward.

Your website uses a popular library called DOMPurify to clean up user-submitted content before displaying it — think of it like a spam filter for dangerous code. A flaw in certain versions of this library means that filter can be tricked, allowing a specially crafted piece of text to sneak harmful scripts past it. This only matters if your site places user-submitted content inside specific HTML form areas (like text boxes), but if it does, the risk is real.

Your application uses an outdated version of Axios, a popular tool for making web requests. A known flaw in this version means that a malicious server — or an unexpectedly large response — can keep sending data even after your app has told it to stop, eventually overwhelming your server and causing it to crash or become unresponsive. The fix is a straightforward library upgrade.

Your website uses an outdated version of a popular form-checking tool called jQuery Validation (version 1.14.0). This version has a known flaw where a visitor could submit a specially crafted input — like a malformed URL — that causes your site to freeze while processing it. Think of it like a lock that jams if you insert a bent key: the door stops working for everyone until the jam clears.

Your application uses a JavaScript helper library called Underscore.js that has a flaw in two of its functions. Under specific conditions, an attacker could send specially crafted deeply-nested data to your server, causing it to crash and become temporarily unavailable. Think of it like sending a letter with 4,500 envelopes nested inside each other — the library tries to open every one and runs out of room.

Your website's Next.js framework has a flaw in how it forwards certain web requests to your backend servers. Under specific conditions, an attacker could craft a specially shaped request that tricks the system into reaching internal or admin areas of your backend that were never meant to be publicly accessible. This only affects self-hosted setups — if your site runs on Vercel, you are not affected.

Your application uses an old version of Axios (v0.12.0), a popular tool that helps your software communicate with other services over the internet. This version has a known flaw that lets anyone send a specially crafted request to slow your server to a crawl — potentially making your app unavailable to real users. Upgrading to a newer version takes a developer less than an hour and fully resolves the issue.

Your website uses a feature in Next.js that automatically resizes and optimises images. A flaw in versions before 15.5.10 means an attacker could point this feature at an extremely large image and force your server to run out of memory — crashing your site. The attacker needs to be able to host or control a large image on a domain your site is already configured to trust.

Your website is running an outdated version of Next.js (the framework powering your web app) that contains a known security flaw. Under specific conditions, this flaw could allow an outside visitor to trick your server into making requests to internal systems it shouldn't be able to reach. A patch is available and the fix is straightforward — update to the latest version.

Your website uses Next.js, a popular framework for building web apps. A flaw in how it caches (stores and reuses) images means that a private image loaded by one logged-in user could be accidentally served to a different user who shouldn't see it. Think of it like a photo printing kiosk that accidentally hands your photos to the next person in line. This only affects sites that serve different images to different users based on who is logged in.