The OWASP Top 10 is a list of the most common and consequential web application risks, maintained by security researchers who look across the whole industry. It was not written with WordPress in mind, but nearly every category shows up in WordPress sites in a recognizable form. If you run a WordPress site, this translation is more useful than the original list, because it tells you exactly where to look.
Broken access control
In WordPress this usually means a plugin that checks whether a user is logged in but forgets to check whether they hold the right capability, or an admin-ajax endpoint that trusts a nonce without verifying the user’s role. The result: a subscriber-level account can trigger actions meant for editors or admins.
What matters most: keep the number of users with elevated roles small, review custom code and plugins for proper capability checks, and use wp user list --role=administrator periodically to confirm the admin list hasn’t grown without your knowledge.
Cryptographic failures
For most sites this shows up as serving admin login or checkout pages over plain HTTP, storing secrets in plaintext in the database, or reusing weak, guessable password reset tokens. Cloudflare’s Universal SSL in front of a site solves the transport layer cleanly, but it doesn’t fix an origin that still accepts unencrypted connections or a plugin storing API keys unencrypted.
What matters most: force HTTPS everywhere, including wp-admin, and make sure any plugin handling payment or personal data doesn’t log secrets in plaintext.
Injection
SQL injection and, increasingly, object injection through insecure deserialization are the classic WordPress vulnerability class, usually introduced through a plugin or theme that builds SQL queries with raw string concatenation instead of $wpdb->prepare(), or that unserializes untrusted input.
What matters most: a web application firewall at the edge (Cloudflare’s WAF is a good example) blocks a large share of injection attempts before they reach your origin, but it is not a substitute for auditing custom code. If you or a contractor writes queries against $wpdb, always use prepared statements.
Insecure design
This is the category for problems baked in at the architecture level rather than a single bug: a membership plugin that trusts client-side role checks, a form that emails a password reset link without expiring it, a custom checkout flow with no rate limiting on discount code guesses.
What matters most: when commissioning custom functionality, ask the developer how it handles abuse cases, not just the happy path. Cheap to ask up front, expensive to retrofit later.
Security misconfiguration
The most common WordPress version of this: directory listing left enabled, debug output (WP_DEBUG_DISPLAY) left on in production so errors leak file paths, default installer files left on the server, or file permissions that let a compromised plugin write outside its own directory.
What matters most: turn off debug display in production, remove installer and setup files after launch, and keep file permissions tight (writable only where WordPress genuinely needs to write, such as wp-content/uploads).
Vulnerable and outdated components
This is the single biggest real-world source of WordPress compromises: an abandoned or unpatched plugin, a theme that hasn’t been touched in years, or a core install running several major versions behind. Attackers scan the web constantly for known-vulnerable plugin signatures; a site doesn’t need to be a specific target to get hit.
What matters most: keep core, themes, and plugins current, and remove anything inactive rather than leaving it dormant. wp-cli makes auditing fast:
wp plugin list --format=table
wp core check-update
wp plugin update --all
Run that on a staging copy first if the site is complex, but don’t let it stop you from running it at all.
Identification and authentication failures
Weak passwords, no rate limiting on the login form, and no two-factor authentication are the classic trio here. Credential stuffing (trying leaked username/password pairs from other breaches against your login page) is automated and constant across the web, WordPress included.
What matters most: require strong passwords for anyone with publishing or admin access, add two-factor authentication for admin accounts at minimum, and rate-limit or otherwise protect the login endpoint. Bot mitigation at the edge helps absorb the automated login attempts before they hit PHP at all.
Software and data integrity failures
This covers trusting an update, plugin, or theme package without verifying its integrity, or auto-loading code from an untrusted source (a “nulled” premium plugin downloaded from outside the official marketplace is the textbook example, and it is a common infection vector).
What matters most: only install plugins and themes from the WordPress.org repository or directly from a vendor you trust and pay for. Never install a cracked or “nulled” copy of a premium plugin; the convenience is not worth the backdoor risk.
Security logging and monitoring failures
Many compromised WordPress sites stay compromised for weeks because nobody notices. No file integrity monitoring, no alert on new admin user creation, no review of access logs, means an attacker can operate quietly.
What matters most: know what your normal traffic and file structure look like well enough to notice when something changes. A quick, periodic check is enough for most sites:
wp user list --role=administrator
wp plugin list --status=active
If either list surprises you, investigate immediately.
Server-side request forgery (SSRF)
Less common but real in WordPress: a plugin that fetches a URL supplied by a user (an image import tool, a webhook handler, an oEmbed-style feature) and doesn’t restrict what internal addresses that request can reach. An attacker can sometimes trick the server into calling internal services it shouldn’t be able to reach from the outside.
What matters most: keep your origin server’s IP address unpublished behind a proxy like Cloudflare, since that limits what an SSRF vulnerability can actually reach, and be cautious with plugins that accept arbitrary URLs as input without restriction.
The takeaway
None of these risks are exotic. Nearly all of them trace back to the same handful of habits: keep software updated, limit who has access and to what, verify code before you trust it, and put an edge layer (WAF, bot mitigation, hidden origin) in front of the parts you can’t fully control yourself. A managed host that handles OS-level patching, WAF rules, and TLS for you removes several of these categories from your daily worry list, but the plugin and user hygiene items stay yours no matter who hosts the site.