MailOptin <= 1.2.49.0 - Missing Authorization to Cache Deletion

5.3
Missing Authorization
CVE CVE-2022-36340
CVSS 5.3 (Medium)
Publicly Published September 23, 2022
Last Updated January 22, 2024
Researcher Muhammad Daffa - Patchstack Alliance

Description

The MailOptin plugin for WordPress is vulnerable to authorization bypass due to a missing capability check on the clear_optin_cache function in versions up to, and including, 1.2.49.0. This makes it possible for unauthenticated attackers to clear the plugin's cache. Additionally, the function was also missing a nonce check.

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Vulnerability Details for MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc.

Software Type Plugin
Software Slug mailoptin (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.2.50.0, or a newer patched version
Affected Version
  • <= 1.2.49.0
Patched Version
  • 1.2.50.0

Recent vulnerabilities in MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc.

# Title CVE ID CVSS Researchers Date
1 MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. <= 1.2.78.0 - Authenticated (Contributor+) Stored Cross-Site Scripting CVE-2026-66703 6.4 Ananda Dhakal July 29, 2026
2 MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. <= 1.2.77.3 - Unauthenticated Privilege Escalation CVE-2026-57813 9.8 qdtad July 9, 2026
3 MailOptin <= 1.2.75.0 - Authenticated (Administrator+) Stored Cross-Site Scripting CVE-2025-58596 4.4 Fiqro Najiah (EscapesCode) September 3, 2025
4 Popup, Optin Form & Email Newsletters for Mailchimp, HubSpot, AWeber – MailOptin <= 1.2.70.3 - Authenticated (Contributor+) Stored Cross-Site Scripting CVE-2024-8628 5.4 Francesco Carlucci September 23, 2024
5 MailOptin <= 1.2.54.0 - Authenticated (Admin+) Cross Site Scripting CVE-2023-23980 5.5 yuyudhn January 20, 2023
6 Popup, Optin Form & Email Newsletters for Mailchimp, HubSpot, AWeber – MailOptin <= 1.2.35.1 - Authorization Bypass 7.3 WPScanTeam June 30, 2021

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