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CVE-2026-4121

The Kcaptcha plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to and including 1.0.1. This is due to missing nonce validation in the plugin's settings page handler (admin/setting.php). The settings form does not include a wp_nonce_field() and the form processing code does not call wp_verify_nonce() or check_admin_referer() before saving settings to the database via $wpdb->update(). This makes it possible for unauthenticated attackers to modify the plugin's CAPT
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c1c57d6e336ff24430da9da62de450e29c6ea3628a4d0a692593395636bde85c
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"Kcaptcha","vendor":"ksolves","versions":[{"lessThanOrEqual":"1.0.1","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8586fe5d38d1e464e59c95bf1198648d1455d71b1266cfa434e2c68dfa5c5bd5 · sha256:8cfb456941523deb… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":4.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8586fe5d38d1e464e59c95bf1198648d1455d71b1266cfa434e2c68dfa5c5bd5 · sha256:8cfb456941523deb… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-352","description":"CWE-352 Cross-Site Request Forgery (CSRF)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8586fe5d38d1e464e59c95bf1198648d1455d71b1266cfa434e2c68dfa5c5bd5 · sha256:8cfb456941523deb… · /containers/cna/problemTypes/0/descriptions/0

Source references

7 source assertions
{"url":"https://plugins.trac.wordpress.org/browser/kcaptcha/tags/1.0.1/admin/setting.php#L12"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8586fe5d38d1e464e59c95bf1198648d1455d71b1266cfa434e2c68dfa5c5bd5 · sha256:8cfb456941523deb… · /containers/cna/references/2
{"url":"https://plugins.trac.wordpress.org/browser/kcaptcha/tags/1.0.1/admin/setting.php#L30"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8586fe5d38d1e464e59c95bf1198648d1455d71b1266cfa434e2c68dfa5c5bd5 · sha256:8cfb456941523deb… · /containers/cna/references/4
{"url":"https://plugins.trac.wordpress.org/browser/kcaptcha/tags/1.0.1/admin/setting.php#L47"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8586fe5d38d1e464e59c95bf1198648d1455d71b1266cfa434e2c68dfa5c5bd5 · sha256:8cfb456941523deb… · /containers/cna/references/6
{"url":"https://plugins.trac.wordpress.org/browser/kcaptcha/trunk/admin/setting.php#L12"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8586fe5d38d1e464e59c95bf1198648d1455d71b1266cfa434e2c68dfa5c5bd5 · sha256:8cfb456941523deb… · /containers/cna/references/1
{"url":"https://plugins.trac.wordpress.org/browser/kcaptcha/trunk/admin/setting.php#L30"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8586fe5d38d1e464e59c95bf1198648d1455d71b1266cfa434e2c68dfa5c5bd5 · sha256:8cfb456941523deb… · /containers/cna/references/3
{"url":"https://plugins.trac.wordpress.org/browser/kcaptcha/trunk/admin/setting.php#L47"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8586fe5d38d1e464e59c95bf1198648d1455d71b1266cfa434e2c68dfa5c5bd5 · sha256:8cfb456941523deb… · /containers/cna/references/5
{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/a6c1c73b-76e3-4cb9-ad53-9d5d4e7519c9?source=cve"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8586fe5d38d1e464e59c95bf1198648d1455d71b1266cfa434e2c68dfa5c5bd5 · sha256:8cfb456941523deb… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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