Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
mailcow: dockerized is an open source groupware/email suite based on docker. In versions prior to 2026-03b, the user dashboard's "Seen successful connections" (login history) renders the client IP from login logs without HTML escaping. Because the server trusts the X-Real-IP header as the source IP for logging, an attacker can inject HTML/JS into this field. This Self-XSS can be exploited by a Login CSRF to force the victim into the attacker's account, and then read emails in a previous browser tab. Version 2026-03b fixes the vulnerability.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
CVE-2026-40875 Stored Cross-Site Scripting in mailcow https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-40875
Post summary
CVE-2026-40875 is identified as a stored cross-site scripting vulnerability in mailcow, with minimal disclosure details and no available PoC, exploit, or mitigation information.