CVE-2026-53591

FreeScout (Laravel-based) prior to v1.8.223 is vulnerable: an unauthenticated attacker can inject messages into existing conversations by sending an email to the public address with a crafted In-Reply-To header. The injected message appears as a legitimate customer reply, reopens the conversation...

Design/Logic Flaw

Cisco Unified Web and E-Mail Interaction Manager places session identifiers in GET requests, which allows remote attackers to inject conversation text by obtaining a valid identifier, aka Bug ID CSCuj43084...