CVE catalog

CVE-2021-32919

prosody: CVE-2021-32919

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published: May 13, 2021, 4:15:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 1.39% · Oct 25, 2026

An issue was discovered in Prosody before 0.11.9. The undocumented dialback_without_dialback option in mod_dialback enables an experimental feature for server-to-server authentication. It does not correctly authenticate remote server certificates, allowing a remote server to impersonate another server (when this option is enabled).

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	prosody	sid	`13.0.7-1`	fixed
Debian	prosody	forky	`13.0.7-1`	fixed
Debian	prosody	trixie	`13.0.1-1+deb131u`	fixed
Debian	prosody	trixie-security	`13.0.1-1+deb131u`	fixed
Debian	prosody	bookworm	`0.12.3-1+deb12u1`	fixed
Debian	prosody	bookworm-security	`0.12.3-1+deb12u1`	fixed
Ubuntu	prosody	16.04	`0.9.8-1`	vulnerable
Ubuntu	prosody	16.04	`0.9.9-1`	vulnerable
Ubuntu	prosody	16.04	`0.9.10-1`	vulnerable
Ubuntu	prosody	pro	`0.9.12-2`	vulnerable
Ubuntu	prosody	pro	`0.10.0-1`	vulnerable
Ubuntu	prosody	pro	`0.10.0-1build1`	vulnerable
Ubuntu	prosody	pro	`0.10.0-1ubuntu0.1~esm1`	vulnerable
Ubuntu	prosody	20.04	`0.11.2-1`	vulnerable
Ubuntu	prosody	20.04	`0.11.3-1`	vulnerable
Ubuntu	prosody	20.04	`0.11.4-1`	vulnerable
Ubuntu	prosody	22.04	`0.11.10-1`	vulnerable
Ubuntu	prosody	22.04	`0.11.10-1build1`	vulnerable
Ubuntu	prosody	22.04	`0.11.10-1build2`	vulnerable
Ubuntu	prosody	22.04	`0.11.11-1`	vulnerable
Ubuntu	prosody	22.04	`0.11.11-2`	vulnerable
Ubuntu	prosody	22.04	`0.11.12-1`	vulnerable
Ubuntu	prosody	22.04	`0.11.13-1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	prosody	source	sid	`0.11.9-1`	not yet assigned	Not reported	[988668]
Debian	prosody	source	forky	`0.11.9-1`	not yet assigned	Not reported	[988668]
Debian	prosody	source	trixie	`0.11.9-1`	not yet assigned	Not reported	[988668]
Debian	prosody	source	bookworm	`0.11.9-1`	not yet assigned	Not reported	[988668]

[Debian bug #988668]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[prosody]Unknown
Details (6)
- 0.12.3-1+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 0.11.9-1
  dsa · prosody · debian · bookworm; dsa · prosody · debian · 12
- 0.12.3-1+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 0.11.9-1
  dsa · prosody · debian · bookworm; dsa · prosody · debian · 12
- 13.0.1-1~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 0.11.9-1
  dsa · prosody · debian · bookworm; dsa · prosody · debian · 12
- 13.0.1-1~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 0.11.9-1
  dsa · prosody · debian · bookworm; dsa · prosody · debian · 12
- 0.12.3-1+deb12u1 · amd64 · bookworm-security
  Fixed · Fixed: 0.11.9-1
  dsa · prosody · debian · bookworm; dsa · prosody · debian · 12
- 0.12.3-1+deb12u1 · arm64 · bookworm-security
  Fixed · Fixed: 0.11.9-1
  dsa · prosody · debian · bookworm; dsa · prosody · debian · 12

[Debian 13 (Trixie)]

[prosody]Unknown
Details (6)
- 13.0.1-1+deb131u · amd64 · trixie
  Fixed · Fixed: 0.11.9-1
  dsa · prosody · debian · 13
- 13.0.1-1+deb131u · arm64 · trixie
  Fixed · Fixed: 0.11.9-1
  dsa · prosody · debian · 13
- 13.0.6-1~bpo13+1 · amd64 · trixie-backports
  Fixed · Fixed: 0.11.9-1
  dsa · prosody · debian · 13
- 13.0.6-1~bpo13+1 · arm64 · trixie-backports
  Fixed · Fixed: 0.11.9-1
  dsa · prosody · debian · 13
- 13.0.1-1+deb131u · amd64 · trixie-security
  Fixed · Fixed: 0.11.9-1
  dsa · prosody · debian · 13
- 13.0.1-1+deb131u · arm64 · trixie-security
  Fixed · Fixed: 0.11.9-1
  dsa · prosody · debian · 13

Observed: Oct 23, 2026, 5:57:36 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]