CVE-2026-4121

🗓️ 22 Apr 2026 07:45:40Reported by WordfenceType

cve🔗 web.nvd.nist.gov👁 8 Views🌐 WEB

Kaptcha CSRF flaw up to 1.0.1 from missing nonce in settings; forged requests can change CAPTCHA.

Reporter	Title	Published	Views	Family All 9
ATTACKERKB	CVE-2026-4121	22 Apr 202607:45	–	attackerkb
CNNVD	WordPress plugin Kcaptcha 跨站请求伪造漏洞	22 Apr 202600:00	–	cnnvd
Cvelist	CVE-2026-4121 Kcaptcha <= 1.0.1 - Cross-Site Request Forgery to Settings Update	22 Apr 202607:45	–	cvelist
EUVD	EUVD-2026-24664	22 Apr 202609:31	–	euvd
NVD	CVE-2026-4121	22 Apr 202609:16	–	nvd
Patchstack	WordPress Kcaptcha plugin <= 1.0.1 - Cross-Site Request Forgery to Settings Update vulnerability	21 Apr 202619:07	–	patchstack
Positive Technologies	PT-2026-34288	22 Apr 202600:00	–	ptsecurity
RedhatCVE	CVE-2026-4121	23 Apr 202620:38	–	redhatcve
Vulnrichment	CVE-2026-4121 Kcaptcha <= 1.0.1 - Cross-Site Request Forgery to Settings Update	22 Apr 202607:45	–	vulnrichment

Vulners

Node

ksolves kcaptchaRange≤1.0.1wordpress

[
  {
    "vendor": "ksolves",
    "product": "Kcaptcha",
    "versions": [
      {
        "version": "0",
        "status": "affected",
        "lessThanOrEqual": "1.0.1",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

Source	Link
plugins	www.plugins.trac.wordpress.org/browser/kcaptcha/tags/1.0.1/admin/setting.php
plugins	www.plugins.trac.wordpress.org/browser/kcaptcha/trunk/admin/setting.php
plugins	www.plugins.trac.wordpress.org/browser/kcaptcha/trunk/admin/setting.php
wordfence	www.wordfence.com/threat-intel/vulnerabilities/id/a6c1c73b-76e3-4cb9-ad53-9d5d4e7519c9
plugins	www.plugins.trac.wordpress.org/browser/kcaptcha/tags/1.0.1/admin/setting.php
plugins	www.plugins.trac.wordpress.org/browser/kcaptcha/tags/1.0.1/admin/setting.php
plugins	www.plugins.trac.wordpress.org/browser/kcaptcha/trunk/admin/setting.php

Parameter	Position	Path	Description	CWE
captcha_on_login	path	admin/setting.php	CSRF in Kcaptcha WordPress plugin allows modification of CAPTCHA settings via forged requests due to missing nonce validation on the settings form processing.	CWE-352
captcha_on_registration	path	admin/setting.php	CSRF in Kcaptcha WordPress plugin allows modification of CAPTCHA settings via forged requests due to missing nonce validation on the settings form processing.	CWE-352
captcha_on_lost_password	path	admin/setting.php	CSRF in Kcaptcha WordPress plugin allows modification of CAPTCHA settings via forged requests due to missing nonce validation on the settings form processing.	CWE-352
captcha_on_comment	path	admin/setting.php	CSRF in Kcaptcha WordPress plugin allows modification of CAPTCHA settings via forged requests due to missing nonce validation on the settings form processing.	CWE-352
captcha_enabled	path	admin/setting.php	CSRF in Kcaptcha WordPress plugin allows modification of CAPTCHA settings via forged requests due to missing nonce validation on the settings form processing.	CWE-352

17 Jun 2026 10:56Current

5.7Medium risk

Vulners AI Score5.7

CVSS 3.14.3

EPSS0.00178

SSVC

CWE-352