CVE-2021-4362

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

The Kiwi Social Share plugin for WordPress is vulnerable to authorization bypass due to a missing capability check on the kiwi_social_share_get_option() function called via the kiwi_social_share_get_option AJAX action in version 2.1.0. This makes it possible for unauthenticated attackers to read and modify arbitrary options on a WordPress site that can be used for complete site takeover. This was a previously fixed vulnerability that was reintroduced in this version.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

No affected versions have been published.

Timeline

Published
Jun 7, 2023
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2021

CVE-2021-436207.5An issue was discovered in the fruity crate through 0.2.0 for Rust. Security-relevant validation of filename extensions is plausibly affecteCVE-2021-436289.8Projectworlds Hospital Management System v1.0 is vulnerable to SQL injection via the email parameter in hms-staff.php.CVE-2021-436299.8Projectworlds Hospital Management System v1.0 is vulnerable to SQL injection via multiple parameters in admin_home.php.CVE-2021-43636.1The WP Quick FrontEnd Editor plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in versions up to, and including, 5.5 due CVE-2021-436308.8Projectworlds Hospital Management System v1.0 is vulnerable to SQL injection via multiple parameters in add_patient.php. As a result, an autCVE-2021-436319.8Projectworlds Hospital Management System v1.0 is vulnerable to SQL injection via the appointment_no parameter in payment.php.CVE-2021-436335.4Sourcecodester Messaging Web Application 1.0 is vulnerable to stored XSS. If a sender inserts valid scripts into the chat, the script will bCVE-2021-436356.1A Cross Site Scripting (XSS) vulnerability exists in Codex before 1.4.0 via Notebook/Page name field, which allows malicious users to executCVE-2021-436369.8Two Buffer Overflow vulnerabilities exists in T10 V2_Firmware V4.1.8cu.5207_B20210320 in the http_request_parse function when processing hosCVE-2021-436378.8Amazon WorkSpaces agent is affected by Buffer Overflow. IOCTL Handler 0x22001B in the Amazon WorkSpaces agent below v1.0.1.1537 allow local CVE-2021-436388.8Amazon Amazon WorkSpaces agent is affected by Integer Overflow. IOCTL Handler 0x22001B in the Amazon WorkSpaces agent below v1.0.1.1537 alloCVE-2021-43644.3The JobSearch WP Job Board plugin for WordPress is vulnerable to authorization bypass due to a missing capability check on the jobsearch_add
CVE-2021-4362: Critical severity, CVSS 9.8 | Vulnix