CVE catalog

CVE-2026-104733

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

[CVE catalog]

Severity: High · CVSS 7.4CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: Oct 2, 2026, 1:17:45 PM UTC
Updated: Oct 2, 2026, 1:17:45 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.21% · Oct 25, 2026

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

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	ejabberd	sid	`26.07-1`	fixed
Debian	ejabberd	forky	`26.07-1`	fixed
Debian	ejabberd	trixie	`24.12-3+deb13u2`	vulnerable
Debian	ejabberd	bookworm	`23.01-1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	ejabberd	source	sid	`26.07-1`	not yet assigned	Not reported	Not reported
Debian	ejabberd	source	forky	`26.07-1`	not yet assigned	Not reported	Not reported
Debian	ejabberd	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	ejabberd	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[ejabberd]Affected
Details (4)
- 23.01-1 · amd64 · bookworm
  Affected
  nvd · ejabberd · debian · bookworm; nvd · ejabberd · debian · 12
- 23.01-1 · arm64 · bookworm
  Affected
  nvd · ejabberd · debian · bookworm; nvd · ejabberd · debian · 12
- 24.12-3~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · ejabberd · debian · bookworm; nvd · ejabberd · debian · 12
- 24.12-3~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · ejabberd · debian · bookworm; nvd · ejabberd · debian · 12

[Debian 13 (Trixie)]

[ejabberd]Affected
Details (2)
- 24.12-3+deb13u2 · amd64 · trixie
  Affected
  nvd · ejabberd · debian · 13
- 24.12-3+deb13u2 · arm64 · trixie
  Affected
  nvd · ejabberd · debian · 13

Observed: Oct 23, 2026, 7:46:39 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]