What is CVE-2021-4362?

CVE-2021-4362 is a critical-severity vulnerability in Wpkube Kiwi Social Share, classified under Missing Authorization. CVSS score: 9.8/10. Published 2023-06-07.

How severe is CVE-2021-4362?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-4362 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Wpkube Kiwi Social Share

CVE-2021-4362

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.

Vulnerability class: Broken Access Control

Published 2023-06-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Wpkube Kiwi Social Share — versions 2.1.0
Wpkube Social Sharing Plugin – Kiwi — versions 2.1.0

Weakness classification (CWE)

CWE-862 — Missing Authorization

Public proof-of-concept exploits

20142995/nuclei-templates

References

www.wordfence.com/threat-intel/vulnerabilities/id/8148b6d0-190a-4b97-8af7-edd69… (Third Party Advisory)
blog.nintechnet.com/wordpress-kiwi-social-sharing-plugin-fixed-critical-vulnera… (Exploit)
wordpress.org/plugins/kiwi-social-share/ (Product)

Frequently asked questions

What is CVE-2021-4362?: CVE-2021-4362 is a critical-severity vulnerability in Wpkube Kiwi Social Share, classified under Missing Authorization. CVSS score: 9.8/10. Published 2023-06-07.
How severe is CVE-2021-4362?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-4362 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.