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CVE-2026-104733

User Impersonation/Authorization Bypass in XMPP Server ejabberd

HIGH
7.4
CVSS Score
Published: October 2, 2026 at 12:19 PM UTC
Updated: October 2, 2026 at 05:59 PM UTC
1 product affected across 1 vendorEjabberd

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Severity
HIGH7.4
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

User Impersonation in ProcessOnes XMMP Server ejabberd <= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Third Party Advisory
Source: cverecord
https://www.nsideattacklogic.de/advisories/NSIDE-SA-2026-004/
Release Notes
Source: cverecord
https://github.com/processone/ejabberd/releases#release-26.07

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.4HIGHNCSC.ch
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-290

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