Threat intelligence

MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. <= 1.2.77.3 - Unauthenticated Privilege Escalation

CVE-2026-57813 · mailoptin

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Mailoptin at a vulnerable version. How SiteRespond intelligence works

Vulnerability: MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. <= 1.2.77.3 - Unauthenticated Privilege Escalation
Affected software: mailoptin(Plugin)
Affected versions: ≤ 1.2.77.3
Authentication: Unauthenticated
Vulnerability type: Privilege escalation
CVE: CVE-2026-57813
Published: 9 July 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: May allow a lower-privilege user to perform actions reserved for administrators.
Source: Data imported from Wordfence Intelligence (advisory 72633a5c-67e7-444f-9a32-ef3266468cee). Methodology and redistribution notes

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