The MailOptin plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 1.2.75.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only impacts multi-site installations and installations where unfiltered_html has been disabled.
CVE-2025-58596 is a medium severity with CVSS 4.4 Stored Cross-Site Scripting issue affecting the Plugin MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc.. It affects Versions up to 1.2.75.0 and is fixed in 1.2.75.1.
CVE-2025-58596 is tracked for the Plugin MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. as medium severity with CVSS 4.4. The affected range is Versions up to 1.2.75.0. Update MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. to 1.2.75.1 or newer where that version is compatible with the site.
| Software Type | Plugin |
|---|---|
| Software Slug |
mailoptin
View on wordpress.org
|
| CVE | CVE-2025-58596 |
| Patched Versions |
1.2.75.1
|
| Affected Versions |
Versions up to 1.2.75.0
|
These internal links group the same WordPress plugin by CVE, issue type, severity, and patch status so operators and search engines can connect the full vulnerability cluster.
MailOptin <= 1.2.54.0 - Authenticated (Admin+) Cross Site Scripting
Popup, Optin Form & Email Newsletters for Mailchimp, HubSpot, AWeber – MailOptin <= 1.2.70.3 - Authenticated (Contributor+) Stored Cross-Site Scripting
MailOptin <= 1.2.49.0 - Missing Authorization to Cache Deletion
Popup, Optin Form & Email Newsletters for Mailchimp, HubSpot, AWeber – MailOptin <= 1.2.35.1 - Authorization Bypass
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