The most common WordPress problems my clients come to me with

Today I want to talk about the three most common categories of problems I encounter. Not to complain about WordPress – because despite everything, it's a great system – but to show you what you can expect and how to avoid these problems.

1. Performance – or why the site loads in 8 seconds

"My site is very slow, can you do something about it?" – I hear this sentence at least once a week. And every time I know I'm in for an investigation that will reveal the same problems.

Typical scenarios:

Unoptimized images

This is problem number one. The client uploads photos straight from the camera – 5MB, 4000x3000px resolution – and places them as 300x200px thumbnails in a gallery. WordPress generates thumbnails, but the original file is still served in some places.

Recently I got a photographer's site where each photo in the portfolio weighed 3-6MB. The homepage loaded 50 photos. I do a quick calculation: 50 × 4MB = 200MB to download. On a slow mobile connection, this could take minutes.

Solution: Image compression (plugins like ShortPixel, Imagify), lazy loading, WebP instead of JPEG/PNG, appropriate thumbnail sizes.

Too many plugins (or poorly configured ones)

Client: "I installed a slider plugin, a gallery plugin, a social media plugin, an SEO plugin, a forms plugin..."

Result: 40+ plugins, half of which do the same thing, and the other half add their scripts and styles to every page, even if they're not used there.

I saw a site that loaded 15 different CSS files and 20 JavaScript files just because each plugin added its assets globally. A site with 50KB of content was loading 2MB of scripts.

Solution: Plugin audit, removing unnecessary ones, combining and minifying CSS/JS (e.g., WP Rocket, Autoptimize), conditional loading – loading scripts only where they're needed.

Lack of caching

WordPress by default generates each page dynamically – every time it queries the database, executes PHP, renders HTML. For a small blog, this isn't a problem, but when you have thousands of visits per day, the server falls to its knees.

I remember the case of an online store that had a TV promotion. Traffic increased 100x within an hour. The site went down because there was no caching. Each request generated database queries, the server couldn't keep up.

Solution: Caching at different levels – object cache (Redis/Memcached), page cache (WP Rocket, W3 Total Cache), CDN (Cloudflare), opcache for PHP.

Hosting on cheap shared hosting

"But I'm paying $5 a month for hosting, that should be enough!"

No, it shouldn't. Especially if you have medium/high traffic or a complex site. Cheap shared hosting divides resources among hundreds of sites. If a neighbor has traffic, your site slows down.

I saw a client who had a site on hosting for $3/month and complained that sometimes it responds in 10 seconds. I checked – the server had 512MB RAM for all the sites the provider hosted there. PHP 5.6, MySQL without optimization.

Solution: Moving to better hosting (VPS, managed WordPress hosting like Kinsta/WP Engine), using modern PHP (7.4+, preferably 8.x), MySQL optimization.

Database full of junk

WordPress saves post revisions, transients (temporary plugin data), spam comments, auto-drafts. After years, a site can have a database weighing several hundred MB, where 80% is junk.

I got a site that had existed for 7 years. The database weighed 850MB. After cleaning revisions, transients, and spam, it was left with... 120MB. Queries sped up by 40%.

Solution: Regular database cleaning (WP-Optimize), limiting revisions in wp-config.php, removing unused tables from old plugins.

What I learned:

Performance isn't one big change, but hundreds of small optimizations. Often clients want a "silver bullet" – one plugin that will fix everything. It doesn't work that way.

Most important: Start by measuring. Use GTmetrix, PageSpeed Insights, Query Monitor. See what's slowing down the site. Only then optimize.

2. Plugins – WordPress's blessing and curse

WordPress without plugins is like a smartphone without apps – theoretically it works, but there's not much you can do with it. The problem is that plugins introduce chaos.

Typical scenarios:

Conflicts between plugins

"I installed a new forms plugin and suddenly the slider stopped working."

Classic. Two plugins use the same JavaScript library in different versions. Or both try to override the same hook. Or one poorly manages the loading order of scripts.

I saw a case where a backup plugin conflicted with an SEO plugin. Why? Because both tried to modify the same meta tags at the wrong time. Result: the site returned a 500 error.

Solution: Testing plugins before deploying to production, enabling debug mode, reading logs, using a staging environment.

Plugins stop being developed

The client has a site that's been running for 5 years. Uses 10 plugins. Half of them haven't been updated in 3 years. "But they work!"

Yes, they work... until you update PHP to version 8.0 or WordPress to the latest version. Then it turns out that old plugins use deprecated functions, throw warnings, and sometimes just stop working.

The worst part is that often these plugins are critical for business – e.g., payment system integration or external service API.

Solution: Regular plugin audits, checking last update dates, looking for alternatives to abandoned plugins, custom development instead of relying on dead plugins.

"Free" plugin does too much

The client installs a "free" plugin for building landing pages. The plugin is free, but... it adds a watermark, limits features, and worst of all – collects user data and sends it to an external service.

Or an "SEO optimization" plugin that installs additional tracking scripts in the background and slows down the site more than it optimizes it.

Solution: Reading reviews, checking what the plugin does "under the hood," using reputable plugins from verified developers, paying for premium if it's key functionality.

Too many "all-in-one" plugins

Elementor, WPBakery, Divi – page builders that promise you'll build any site without code. Problem? They generate huge amounts of HTML, load their own CSS/JS frameworks, create vendor lock-in.

I saw a site built in Elementor where a single landing page had 15,000 lines of HTML (most of it divs wrapping divs) and loaded 1.2MB of CSS just for the builder.

Solution: Using page builders consciously, custom development for critical pages, Gutenberg block editor as a lighter alternative.

Plugins introduce security vulnerabilities

This leads me to the third point, but it's worth mentioning here: 90% of attacks on WordPress exploit vulnerabilities in plugins, not in core.

The client had an old version of a contact form plugin installed. A hacker exploited a known vulnerability (SQL injection), got into the database, stole user data.

Solution: Plugin updates, removing unused plugins, security monitoring (Wordfence, Sucuri).

What I learned:

The fewer plugins, the better. The question I ask myself: "Is this functionality really needed? Can I do this with code in functions.php? Is there a lighter alternative?"

Plugins are wonderful tools, but each introduces potential problems. Use them wisely.

3. Security – or "someone hacked my site"

This is the worst call you can get from a client. "My site is displaying spam," "Google says the site is dangerous," "all my users got weird emails."

Typical scenarios:

Weak passwords and no 2FA

Login: admin

Password: admin123

Sounds like a joke, but I've seen this more times than I'd like to admit. Bots are constantly trying to brute-force WordPress login. If you have a weak password, it's a matter of time.

A client had a site with the password "company-name123". A bot broke in within an hour, installed a backdoor, started sending spam.

Solution: Strong passwords (password manager), 2FA (plugins like Wordfence, Google Authenticator), changing the default "admin" login, login attempt limits.

Outdated WordPress/plugins/themes

"I don't update because I'm afraid something will break."

And as a result, the site gets hacked because it uses a known vulnerability from a year ago. WordPress Core is regularly patched, plugins too – but only if you update them.

I saw a site on WordPress 4.9 (when the current version was 6.x). It had 15 plugins installed, none updated in 2 years. The site was full of malware.

Solution: Automatic updates for core and plugins (with testing on staging), regular security audits, backup before each update.

No backups

"Can you recover my site? It got hacked."

"Do you have a backup?"

"No..."

This happens more often than you think. The site gets hacked, hosting doesn't do backups (or does, but stores them on the same server that got hacked), the client has no local copies.

Result: the site is lost or recovery costs a fortune.

Solution: Automatic backups (UpdraftPlus, BackWPup), storing backups off-server (Google Drive, Dropbox, S3), testing recovery (because a backup you can't recover is useless).

File and directory permissions

WordPress should have specific permissions: 755 for directories, 644 for files. I've seen installations with 777 everywhere – "because it didn't work otherwise."

777 means anyone can write to those files. A hacker can upload a backdoor, modify core, install malware.

Solution: Proper permissions (755/644), file owner set correctly, disabling file editing from WordPress admin.

No SSL/HTTPS

In 2026 this is already standard, but I still encounter sites without SSL. The problem isn't just that Google penalizes such sites – but primarily that login credentials are transmitted in plain text.

A hacker on public WiFi can intercept admin login and password.

Solution: SSL/TLS (free Let's Encrypt), forcing HTTPS in WordPress, HSTS headers.

Malware hidden in nulled themes/plugins

Client: "I found a premium theme for free on a forum, saved $60!"

Reality: The theme contains a backdoor that activates after a week and starts sending spam, injecting malicious scripts, redirecting users to phishing sites.

Nulled themes/plugins are the surest way to get your site hacked.

Solution: Buying themes and plugins from official sources (ThemeForest, WordPress.org repositories), regular malware scanning (Wordfence, Sucuri).

What I learned:

Security isn't a one-time action, but a process. It's not enough to configure once and forget. You need to:

• Regularly update
• Monitor logs
• Make backups
• Audit permissions and user accounts
• Use scanning tools

And most important: educate the client. Because it's most often the client who clicks on a phishing link or installs a "free premium theme."

Summary: Is WordPress bad?

No. WordPress powers 43% of all websites on the internet. This testifies to its strength and flexibility.

But it has its problems, and most of them result from:

• User ignorance (weak passwords, lack of updates)
• The plugin ecosystem (quality varies, some plugins are disasters)
• Cheap infrastructure (hosting for $5 won't handle a proper site)

If you run a WordPress site, remember:

1. Performance: Optimize images, use caching, choose good hosting, clean the database
2. Plugins: Less is more, update regularly, test before deployment, avoid abandoned plugins
3. Security: Strong passwords + 2FA, updates, backups, monitoring, SSL

WordPress can be fast, secure, and stable – but it requires conscious management. It's not "set it and forget it," it's a system that needs attention.

And if you feel like this all sounds complicated – maybe it's worth considering hiring a specialist. Sometimes saving on technical support costs more than the hosting itself.