WordPress plugin
Kcaptcha security & vulnerabilities
Unpatched vulnerability in the latest version
At least one vulnerability affects the latest version and no fix has been released. Deactivate the plugin or restrict access to the affected feature until the vendor ships a patch.
- Critical0
- High0
- Medium1
- Low0
All Kcaptcha vulnerabilities
Nothing in this view
No vulnerabilities match this filter. Show all.
Kcaptcha: common questions
Does Kcaptcha have known vulnerabilities?
Yes. VulnCrest Radar lists 1 known vulnerability in Kcaptcha: 1 medium. At least one is not fixed in the latest version.
How do I check which version of Kcaptcha I run?
In wp-admin open Plugins → Installed Plugins; the version is shown under the name. Without admin access, our passive Check my site tool can often read it from public files.
What is the most recent Kcaptcha vulnerability?
CVE-2026-4121, published Apr 21, 2026: Kcaptcha <= 1.0.1 - Cross-Site Request Forgery to Settings Update. Severity: Medium (CVSS 4.3).
Is any Kcaptcha vulnerability listed in CISA KEV?
No. None of the known Kcaptcha vulnerabilities is currently listed in the CISA KEV catalog.