Threat actors are exploiting an unauthenticated information disclosure vulnerability in the WordPress plugin Gravity SMTP, active on 100,000 sites.

Threat actors are exploiting an unauthenticated information disclosure vulnerability in the WordPress plugin Gravity SMTP, active on 100,000 sites.

Attackers are exploiting CVE-2026-4020 in Gravity SMTP to leak API keys, OAuth tokens, and system data from WordPress sites.