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In the web development landscape, few platforms have experienced an arc as emblematic as Joomla. Born as a more structured alternative to WordPress, for years it was the go-to CMS for web agencies that needed to develop complex portals, corporate intranets and institutional websites.
But today, in 2026, the market has changed. The performance bar has risen drastically with the introduction of Core Web Vitals, and data protection regulations (such as the GDPR and the NIS2 directive) show no mercy to vulnerable infrastructures.
As software engineers at Keidea s.r.l., we analyze legacy architectures on a daily basis. And the question we're most often asked by clients with a site built on this platform is always the same: "Does it still make sense to invest budget in optimizing Joomla's performance and patching vulnerabilities, or is it time to switch infrastructure?"
In this technical guide, we'll take an in-depth look at the state of the art of Joomla, its chronic issues with speed and security, and explain why switching to a proprietary CMS like KeideaCMS is no longer a luxury, but an operational necessity.
The update maze: the end of life (EOL)
Even before talking about how to optimize performance, there's an elephant in the room that anyone managing a Joomla site can't ignore: the software's lifecycle. Joomla's release model forces frequent and painful structural migrations.
Joomla 3 is now a museum piece, left to fend for itself. But the real problem is that even Joomla 4.x reached its official End of Life (EOL) in October 2025. This means that if your company site is still running on Joomla 4, it's no longer receiving security patches. You are officially an easy target. Upgrading to version 5.x or the newly-released version 6.0 is never a simple "click Update". It often requires rewriting the template and replacing third-party extensions that are no longer compatible, with agency costs that can match those of building a website from scratch.
Optimizing Joomla's performance: an uphill battle
If you've read our guide on how to optimize WordPress performance, you know that Open Source suffers from structural issues. Joomla is no exception. In fact, in some ways, its component, module and plugin architecture makes it even more prone to systemic slowdowns.
A standard Joomla site, without heavy optimizations, loads dozens of separate CSS and JavaScript files for every single module present on the page.
This causes speed metrics on mobile devices to collapse miserably. To try to improve speed, developers are forced to resort to external extensions (such as JCH Optimize or LiteSpeed Cache) to combine and minify assets. But these "band-aid" solutions often break the site's layout or generate JavaScript conflicts that are hard to debug.
Database bottlenecks
Joomla's database has historically been heavy. Tables such as #__session and #__finder_terms (if you use smart search) can swell excessively.
Every time a user visits the site, Joomla must query the database not only for the article's content, but to verify the access permissions (ACL) of every single module loaded on the page. On high-traffic sites, this generates a Time to First Byte (TTFB) that frustrates the user and penalizes search engine ranking.
The weight of the template engine
While modern architectures use lightweight, compiled rendering engines like Twig 3.x, Joomla carries a legacy of PHP code mixed with HTML in template override files. This approach not only makes maintenance difficult, but also slows down the page generation process on the server.
The security crisis: 2025-2026 data
Optimizing speed is useless if the site gets compromised. And on the security front, recent data is alarming. As happens for those trying to optimize slow e-commerce sites on PrestaShop, Joomla's real Achilles' heel is not just the core, but the ecosystem of third-party extensions.
However, even Joomla's core is not immune to critical flaws. In March 2026, security researchers published details of CVE-2025-25226, an SQL Injection (SQLi) vulnerability classified as CRITICAL (CVSS 9.8).
This flaw, nested in the framework's database package (specifically in the quoteNameStr method), allows unauthenticated remote attackers to manipulate queries and gain total control of the database, simply by exploiting third-party extensions that call that method in an unsafe way.
Added to this are vulnerabilities discovered between late 2024 and 2025, such as CVE-2024-40745 (Reflected XSS in well-known components for form management) and SQL injection flaws in extremely popular extensions for event and comment management. When you entrust your company's data to a fragmented ecosystem, you are accepting a systemic risk that is unacceptable under current regulations.
The proprietary alternative: the engineering behind KeideaCMS
Continuing to invest thousands of euros a year to upgrade Joomla from version 4 to 5, paying for caching extensions and living in fear of the next SQL Injection exploit, is a losing strategy. We at Keidea s.r.l. created KeideaCMS precisely for companies that want to get off this hamster wheel.
Native performance, no extensions
KeideaCMS doesn't need plugins like JCH Optimize to optimize performance. The infrastructure is based on a native LEMP stack and a pure MVC architecture. GZIP compression, WebP image optimization, lazy loading and asset minification are built in at the core level. Routing is handled by proprietary algorithms that guarantee instant TTFB, without the heavy ACL queries that plague Joomla.
Security by Design and parameterized queries
Unlike Joomla, where a poorly written extension can open an SQL Injection vulnerability (as demonstrated by CVE-2025-25226), KeideaCMS is a closed and controlled environment.
There are no third-party plugins. Our engineers write every line of code. We exclusively use parameterized queries at the framework level: this means it is mathematically impossible for an attacker to inject malicious SQL code into the database. Data collected from forms is natively encrypted, ensuring full compliance with GDPR and the NIS2 directive.
Simplified block-based management
Anyone who uses Joomla knows the frustration of having to manage modules assigned to invisible template positions. KeideaCMS uses an extremely intuitive drag-and-drop block editor. You see exactly what you're building. And above all, our multilingual system is native: you don't have to duplicate menus, modules and categories as in Joomla to translate a single page.
Joomla has made web history, but 2026 calls for different technologies. Optimizing a Joomla site today means fighting against an architecture that is showing its age, facing ongoing version migration costs and increasingly higher security risks.
Your company website is too important an asset to be left at the mercy of outdated extensions and End-of-Life versions. It's time to move to an enterprise-grade infrastructure, designed to be fast, secure and unassailable from the ground up.
Stop paying for unnecessary updates. Contact us today to request a Free Audit of your website. Our engineers will analyze your Joomla infrastructure and show you how migrating to KeideaCMS can cut maintenance costs and lock down your digital presence.
