What is the CVSS score of CVE-2018-10847?

CVE-2018-10847 has a CVSS 3.0 base score of 8.8 (High). CVSS vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 1.7%.

Prosody CVE-2018-10847

HIGH

DEPRECATED: Authentication Bypass Issues (CWE-592)

2018-07-30 secalert@redhat.com

Authentication Bypass Prosody

8.8

CVSS 3.0 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-592
Impact	CVSS score of 8.8 (HIGH). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 1.7% exploitation probability (EPSS)

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AnalysisAI

prosody before versions 0.10.2, 0.9.14 is vulnerable to an Authentication Bypass. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

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Technical ContextAI · show details

This vulnerability is classified under CWE-592. 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. Affected products include: Prosody.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.8 HIGH

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionNVD

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.

Threat Intelligence Overview

EPSS Score

1.7%

Top 26% exploitable

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 1.7%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +2

CVSS: +44

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)NVD

cpe:2.3:a:prosody:prosody:*:*:*:*:*:*:*:*

cpe:2.3:a:prosody:prosody:0.10.0:*:*:*:*:*:*:*

cpe:2.3:a:prosody:prosody:0.10.1:*:*:*:*:*:*:*

More in Prosody

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CVE-2014-2744 HIGH This Week POC

7.8 Apr 11

plugins/mod_compression.lua in (1) Prosody before 0.9.4 and (2) Lightwitch Metronome through 3.4 negotiates stream compr

CVE-2022-0217 HIGH This Week POC

7.5 Aug 26

It was discovered that an internal Prosody library to load XML based on libexpat does not properly restrict the XML feat

CVE-2021-37601 HIGH This Week POC

7.5 Jul 30

muc.lib.lua in Prosody 0.11.0 through 0.11.9 allows remote attackers to obtain sensitive information (list of admins, me

CVE-2020-8086 CRITICAL Act Now

9.8 Jan 28

The mod_auth_ldap and mod_auth_ldap2 Community Modules through 2020-01-27 for Prosody incompletely verify the XMPP addre

CVE-2014-2745 HIGH This Week

7.8 Apr 11

Prosody before 0.9.4 does not properly restrict the processing of compressed XML elements, which allows remote attackers

CVE-2016-1232 HIGH This Week

7.5 Jan 12

The mod_dialback module in Prosody before 0.9.9 does not properly generate random values for the secret token for server

CVE-2021-32920 HIGH This Week

7.5 May 13

Prosody before 0.11.9 allows Uncontrolled CPU Consumption via a flood of SSL/TLS renegotiation requests. Rated high seve

CVE-2021-32919 HIGH This Week

7.5 May 13

An issue was discovered in Prosody before 0.11.9. Rated high severity (CVSS 7.5), this vulnerability is remotely exploit

CVE-2021-32918 HIGH This Week

7.5 May 13

An issue was discovered in Prosody before 0.11.9. Rated high severity (CVSS 7.5), this vulnerability is remotely exploit

CVE-2026-43505 MEDIUM This Month

6.5 May 01

Unauthenticated traffic relay vulnerability in Prosody mod_proxy65 module allows network attackers to bypass access cont

CVE-2026-43504 MEDIUM This Month

6.5 May 01

Improper access control in Prosody's mod_proxy65 module allows unauthenticated relaying of traffic when the module enter

CVE-2016-1231 MEDIUM This Month

5.9 Jan 12

Directory traversal vulnerability in the HTTP file-serving module (mod_http_files) in Prosody 0.9.x before 0.9.9 allows

Same weakness CWE-592 – DEPRECATED: Authentication Bypass Issues

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CVE-2018-10933 CRITICAL POC

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CVE-2024-42759 MEDIUM POC

6.3

CVE-2026-43512 CRITICAL

9.8

CVE-2019-3899 CRITICAL

9.8

CVE-2018-14643 CRITICAL

9.8

CVE-2018-1085 CRITICAL

9.8

CVE-2017-2684 CRITICAL

9.0

CVE-2019-10201 HIGH

8.1

Same technique Authentication Bypass

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CVE-2015-3306 CRITICAL POC

10.0

CVE-2023-22515 CRITICAL POC

9.8

CVE-2012-4681 CRITICAL POC

9.8

CVE-2013-2465 CRITICAL POC

9.8

CVE-2011-3544 CRITICAL POC

9.8

CVE-2022-40684 CRITICAL POC

9.8

CVE-2025-61882 CRITICAL POC

9.8

CVE-2024-0012 CRITICAL POC

9.3

References

Advisories & patches

ADVISORY https://blog.prosody.im/prosody-0-10-2-security-release/ ADVISORY https://issues.prosody.im/1147 ADVISORY https://prosody.im/security/advisory_20180531/ REF https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10847 REF https://www.debian.org/security/2018/dsa-4216

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