WordPress powers a huge share of the web, and WooCommerce is the most popular way to sell things on it. That popularity is exactly why both are constantly under automated attack. Security researchers scan the internet continuously for known WordPress and plugin vulnerabilities, not because any individual store is a target, but because the sheer number of WordPress sites makes automated, broad attacks worthwhile at scale. If your store is running an outdated plugin with a known exploit, it will eventually get found — usually by a bot, not a person.
The attack surface is bigger than "WooCommerce"
When people think about WooCommerce security, they usually think about WooCommerce itself. In practice, your actual attack surface is: WordPress core, your theme, and every single plugin you run, each maintained on its own schedule by its own developer with its own security track record. A store running thirty plugins has thirty separate codebases that all need to stay patched, any one of which can be the entry point.
This is structurally different from a hosted platform, where the vendor is responsible for the security of the entire stack and pushes fixes centrally, without you needing to test compatibility or manually apply anything.
The most common real-world issues
Outdated plugins with known CVEs. This is, by a wide margin, the most common way WooCommerce stores get compromised. A vulnerability gets publicly disclosed, a patch ships, and stores that don't update within days or weeks become targets for automated exploitation.
Weak or reused admin credentials. Brute-force login attempts against /wp-admin are constant background noise on the web. Stores without two-factor authentication or login attempt limiting are exposed to this by default.
Nulled or pirated premium plugins. Some store owners, trying to avoid licensing costs, install "nulled" versions of premium plugins from third-party sites. These are a well-documented vector for injected malware, since the person redistributing them has no incentive to keep your store safe.
Outdated PHP versions. Older PHP versions stop receiving security patches, and some hosts don't force upgrades. Running an unsupported PHP version quietly widens your exposure without any visible symptom until something goes wrong.
File upload vulnerabilities in form or review plugins. Any plugin that accepts file uploads from users — review images, custom product uploads, support ticket attachments — is a potential vector if it doesn't validate file types strictly.
What actually reduces the risk
Update on a schedule, not reactively. Security patches should be applied within days, not "whenever we get to it." If manual testing before every update is too slow, that's an argument for a staging environment, not for skipping updates.
Use a Web Application Firewall. Services like Cloudflare, Sucuri, or Wordfence's firewall filter out a large share of automated attack traffic before it ever reaches your server.
Enforce 2FA for all admin accounts. This single change eliminates most credential-stuffing risk, and it's free to set up.
Limit login attempts and hide or protect /wp-admin. Reduces the effectiveness of brute-force scanning significantly.
Audit plugin permissions and remove anything inactive. An inactive plugin can still contain a live vulnerability sitting on your server, unpatched, doing nothing except waiting to be found.
Keep offsite, automated backups. Not a prevention measure, but the single most important mitigation if something does go wrong — the difference between a bad afternoon and a genuine business crisis.
The trade-off worth naming honestly
This isn't an argument that self-hosted stores are unsafe by nature — plenty of WooCommerce stores run for years without incident, especially with disciplined maintenance. But that discipline is work, ongoing and indefinite, and the responsibility sits entirely with you or whoever you've delegated it to.
On a hosted platform like Shopify, PCI compliance, infrastructure security, and platform-level patching are handled centrally by the vendor, as part of what you're paying for. You give up some control over the underlying stack in exchange for not being the one responsible for tracking CVEs across thirty plugins. Whether that trade-off makes sense depends on how much security expertise and time your team already has — but it's worth weighing deliberately rather than by default.