CVE-2017-5603: An incorrect implementation of "XEP-0280: Message Carbons" in multiple XMPP clients allows a remote attacke...

Security readout for executives and security teams

CVE-2017-5603 lets a remote attacker make vulnerable Jitsi clients display chat messages as if they came from someone else. The business risk is deception: users may trust fraudulent messages from apparent contacts and take unsafe actions. Exposure appears limited to organizations still using affected Jitsi versions 2.5.5061 through 2.9.5544 in XMPP environments where Message Carbons are relevant. The bundle references multiple XMPP clients generally, but this CVE entry is specifically for Jitsi. Treat this as a moderate-priority trust and social engineering risk. It is most urgent where Jitsi chat is used for operational approvals, credential requests, incident coordination, or other workflows where message identity drives decisions. Mitigation focus: Identify any Jitsi clients in the affected 2.5.5061 through 2.9.5544 range.; Review Jitsi vendor guidance and the referenced fixing commit before selecting remediation.; Upgrade affected Jitsi clients to a version outside the vulnerable range where feasible..

Prepared

Jun 13, 2026, 06:20 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.