CVE-2016-8741

The Apache Qpid Broker for Java can be configured to use different so called AuthenticationProviders to handle user authentication. Among the choices are the SCRAM-SHA-1 and SCRAM-SHA-256 AuthenticationProvider types. It was discovered that these AuthenticationProviders in Apache Qpid Broker for Java 6.0.x before 6.0.6 and 6.1.x before 6.1.1 prematurely terminate the SCRAM SASL negotiation if the provided user name does not exist thus allowing remote attacker to determine the existence of user accounts. The Vulnerability does not apply to AuthenticationProviders other than SCRAM-SHA-1 and SCRAM-SHA-256.

Published: 2017-05-15 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-8741 is rated High Risk (67.4/100): CVSS High severity, with high exploitation likelihood (EPSS 6.18%, 93th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +5.41% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2016-8741

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.77% 6.18% +5.41%
2 2026-05-23 0.39% 0.77% +0.38%
3 2026-04-14 — 0.39% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-8741

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2016-8741

GitHub Security Advisory for CVE-2016-8741

GHSA-8vvh-crqv-jm64 · Severity: high · Ecosystem: maven — Exposure of Sensitive Information to an Unauthorized Actor in Apache Qpid Broker for Java

OS Trackers for CVE-2016-8741

vendor priority summary link
redhat low — https://access.redhat.com/security/cve/CVE-2016-8741

Affected software / configurations for CVE-2016-8741

Vendor Product Version Raw CPE
apache qpid_broker-j 6.0.1 cpe:2.3:a:apache:qpid_broker-j:6.0.1:*:*:*:*:*:*:*
apache qpid_broker-j 6.0.2 cpe:2.3:a:apache:qpid_broker-j:6.0.2:*:*:*:*:*:*:*
apache qpid_broker-j 6.0.3 cpe:2.3:a:apache:qpid_broker-j:6.0.3:*:*:*:*:*:*:*
apache qpid_broker-j 6.0.4 cpe:2.3:a:apache:qpid_broker-j:6.0.4:*:*:*:*:*:*:*
apache qpid_broker-j 6.0.5 cpe:2.3:a:apache:qpid_broker-j:6.0.5:*:*:*:*:*:*:*
apache qpid_broker-j 6.1.0 cpe:2.3:a:apache:qpid_broker-j:6.1.0:*:*:*:*:*:*:*

References for CVE-2016-8741

cvelogic Threat Intelligence