CVE-2017-5591: Poezio

Medium severity, CVSS 5.9. EPSS: 1.7% chance of exploitation in the next 30 days.

An incorrect implementation of "XEP-0280: Message Carbons" in multiple XMPP clients allows a remote attacker to impersonate any user, including contacts, in the vulnerable application's display. This allows for various kinds of social engineering attacks. This CVE is for SleekXMPP up to 1.3.1 and Slixmpp all versions up to 1.2.3, as bundled in poezio (0.8 - 0.10) and other products.

Affected products

• Poezio Poezio: version 0.8 only; version 0.8.1 only; version 0.9 only; version 0.10 only
• Sleekxmpp Project Sleekxmpp: up to and including 1.3.1
• Slixmpp Project Slixmpp: up to and including 1.2.3

Published 2017-02-09. Last modified 2026-06-17.