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CVE-2018-10847

prosody before versions 0.10.2, 0.9.14 is vulnerable to an Authentication Bypass. Prosody did not...

4.2 MediumFix available

prosody before versions 0.10.2, 0.9.14 is vulnerable to an Authentication Bypass. Prosody did not verify that the virtual host associated with a user session remained the same across stream restarts. A user may authenticate to XMPP host A and migrate their authenticated session to XMPP host B of the same Prosody instance.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
None

Exploit likelihood

1.59%Up 0.3 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 4.2

prosody before versions 0.10.2, 0.9.14 is vulnerable to an Authentication Bypass. Prosody did not verify that the virtual host associated with a user session remained the same across stream restarts. A user may authenticate to XMPP host A and migrate their authenticated session to XMPP host B of the same Prosody instance.

Record
CVE-2018-10847
CVSS 3.0
4.2 MediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-592
Updated
2026-11-02
EUVDEUVD-2018-2916 4.2

prosody before versions 0.10.2, 0.9.14 is vulnerable to an Authentication Bypass. Prosody did not verify that the virtual host associated with a user session remained the same across stream restarts. A user may authenticate to XMPP host A and migrate their authenticated session to XMPP host B of the same Prosody instance.

Record
EUVD-2018-2916
CVSS 3.0
4.2 MediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-r7gq-256h-j4mq 8.8

prosody before versions 0.10.2, 0.9.14 is vulnerable to an Authentication Bypass. Prosody did not...

prosody before versions 0.10.2, 0.9.14 is vulnerable to an Authentication Bypass. Prosody did not verify that the virtual host associated with a user session remained the same across stream restarts. A user may authenticate to XMPP host A and migrate their authenticated session to XMPP host B of the same Prosody instance.

Record
GHSA-r7gq-256h-j4mq
CVSS 3.0
8.8 HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-287
Updated
2026-11-02
NVD 4.2

prosody before versions 0.10.2, 0.9.14 is vulnerable to an Authentication Bypass. Prosody did not verify that the virtual host associated with a user session remained the same across stream restarts. A user may authenticate to XMPP host A and migrate their authenticated session to XMPP host B of the same Prosody instance.

Record
CVE-2018-10847
CVSS 3.0
4.2 MediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS 3.0
8.8 HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
6.5 MediumAV:N/AC:L/Au:S/C:P/I:P/A:P
Weakness
CWE-592, CWE-287
Updated
2026-11-02
OSV 8.8

prosody before versions 0.10.2, 0.9.14 is vulnerable to an Authentication Bypass. Prosody did not verify that the virtual host associated with a user session remained the same across stream restarts. A user may authenticate to XMPP host A and migrate their authenticated session to XMPP host B of the same Prosody instance.

Record
CVE-2018-10847
CVSS 3.0
8.8 HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2018-10847 8.8

prosody before versions 0.10.2, 0.9.14 is vulnerable to an Authentication Bypass. Prosody did not verify that the virtual host associated with a user session remained the same across stream restarts. A user may authenticate to XMPP host A and migrate their authenticated session to XMPP host B of the same Prosody instance.

Record
DEBIAN-CVE-2018-10847
CVSS 3.0
8.8 HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2018-10847 4.2

prosody before versions 0.10.2, 0.9.14 is vulnerable to an Authentication Bypass. Prosody did not verify that the virtual host associated with a user session remained the same across stream restarts. A user may authenticate to XMPP host A and migrate their authenticated session to XMPP host B of the same Prosody instance.

Record
UBUNTU-CVE-2018-10847
CVSS 3.0
4.2 MediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS 3.0
8.8 HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUSN-4834-1 No score

prosody vulnerability

It was discovered that Prosody incorrectly validated the virtual host associated with a user session across stream restarts. A remote attacker could use this issue to gain unintended access to resources.

Record
USN-4834-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
prosody
Debian:12
 before 0.10.2-1
0.10.2-1
prosody
Debian:13
 before 0.10.2-1
0.10.2-1
prosody
Debian:14
 before 0.10.2-1
0.10.2-1
prosody
Debian:8
 before 0.9.7-2+deb8u4, plus listed versions
0.9.7-20.9.7-2+deb8u10.9.7-2+deb8u20.9.7-2+deb8u3
0.9.7-2+deb8u4
prosody
Debian:9
 before 0.9.12-2+deb9u2, plus listed versions
0.9.12-20.9.12-2+deb9u1
0.9.12-2+deb9u2
prosody
Ubuntu:16.04:LTS
 All versions, plus listed versions
0.9.8-10.9.9-10.9.10-1
 None known
prosody
Ubuntu:Pro:18.04:LTS
 before 0.10.0-1ubuntu0.1~esm1, plus listed versions
0.9.12-20.10.0-10.10.0-1build1
0.10.0-1ubuntu0.1~esm1

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-10847 is a medium vulnerability (CVSS 4.2) in [unknown] Prosody, published June 2, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.59%, the 75th percentile. Fixed in prosody 0.10.2-1.

References

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