Medium (5.9) in conversejs converse.js. EPSS 0.9% chance of exploitation in the next 30 days. Fixed in converse.js 1.0.7, 2.0.5.
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 Converse.js (0.8.0 - 1.0.6, 2.0.0 - 2.0.4).
Severity
CVSS 3.0
5.9 medium
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
0.9% chance of exploitation in the next 30 days; higher than 60% of CVEs (scores of 2026-10-31)