CVE-2026-66703mediumCWE-79

CVE-2026-66703: medium-severity vulnerability in properfraction MailOptin

WordPress MailOptin plugin <= 1.2.78.0 - Cross Site Scripting (XSS) vulnerability

Published

Follow this CVE+ Monitor MailOptin

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.5epss 0.2%
Contributor Cross Site Scripting (XSS) in MailOptin <= 1.2.78.0 versions.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Affected products
properfraction · MailOptin
Related CVEs — properfraction MailOptin

In the same product, most dangerous first.

CVE-2026-57813CRITICALWordPress MailOptin plugin <= 1.2.77.3 - Privilege Escalation vulnerabilityEPSS 0.5%CVE-2025-58596MEDIUMWordPress MailOptin Plugin <= 1.2.75.0 - Cross Site Scripting (XSS) VulnerabilityEPSS 0.2%