Cybersecurity

CVE

Common Vulnerabilities and Exposures: the public catalog that gives each known security flaw a unique ID.

By Nick Irmo · Updated

What CVE means

CVE IDs let security tools and vendors talk about the same flaw precisely. Scanners match your installed software against CVEs to flag risks. Watching CVEs for your CMS and plugins tells you when updates are urgent.

Why it matters for your website

When a plugin, theme or server package you use has a CVE, attackers can look up the same entry you can. Knowing which CVEs affect your site tells you what to patch first. Ignoring them is one of the most common ways small business sites get hacked.

Example

A security scanner flags that a contact form plugin on a law firm's site has a published CVE. The fix is already out, so updating the plugin closes the hole that afternoon.

Tips

  • Use a security plugin or scanner that matches your installed software against known CVEs.
  • Patch issues with high severity scores first, especially ones that need no login to exploit.
  • Remove plugins and themes you no longer use so they cannot carry new vulnerabilities.

Common mistakes

  • Assuming a CVE does not apply because your site is small and nobody would target it.
  • Delaying updates for weeks after a fix is released, while automated attacks are already scanning.

Questions about CVE

What is CVE?
Common Vulnerabilities and Exposures: the public catalog that gives each known security flaw a unique ID.
What is the difference between a CVE and a CVSS score?
A CVE is the ID for a specific flaw. A CVSS score rates how severe that flaw is on a scale of 0 to 10, which helps you decide what to fix first.
Where can I look up a CVE?
The official CVE list and the US National Vulnerability Database both let you search by ID or product name. Many security tools also show CVE details for the software you run.

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