CVE-2026-57958: Inovector Mixpost

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Mixpost through 2.6.0 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to execute arbitrary JavaScript in authenticated users' browsers by crafting malicious OAuth callback URLs with unsanitized error query parameters. Attackers can exploit the OAuth callback controller's failure to sanitize error parameters before rendering them through Laravel flash messages via the Vue v-html directive to hijack authenticated user sessions or perform unauthorized actions.

Affected products

• Inovector Mixpost: up to and including 2.6.0

Published 2026-06-29. Last modified 2026-06-29.