CVE-2015-5619

Logstash 1.4.x before 1.4.5 and 1.5.x before 1.5.4 with Lumberjack output or the Logstash forwarder does not validate SSL/TLS certificates from the Logstash server, which might allow attackers to obtain sensitive information via a man-in-the-middle attack.

Published: 2017-08-09 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-5619 is rated Moderate Risk (47.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.22%). Review affected assets and schedule 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-2015-5619

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 0.31% 1.22% +0.91%
2 2025-06-14 0.20% 0.31% +0.11%
3 2025-03-30 — 0.20% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-5619

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.0 MEDIUM
CVSS:3.0/AV:N/AC:H/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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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.
 2.2 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/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:M)
Exploitation needs some favorable conditions, but not exceptional ones.
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.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2015-5619

Affected software / configurations for CVE-2015-5619

Vendor Product Version Raw CPE
elastic logstash 1.4.0 cpe:2.3:a:elastic:logstash:1.4.0:*:*:*:*:*:*:*
elastic logstash 1.4.1 cpe:2.3:a:elastic:logstash:1.4.1:*:*:*:*:*:*:*
elastic logstash 1.4.2 cpe:2.3:a:elastic:logstash:1.4.2:*:*:*:*:*:*:*
elasticsearch logstash 1.4.3 cpe:2.3:a:elasticsearch:logstash:1.4.3:*:*:*:*:*:*:*
elasticsearch logstash 1.4.4 cpe:2.3:a:elasticsearch:logstash:1.4.4:*:*:*:*:*:*:*
elasticsearch logstash 1.5.0 cpe:2.3:a:elasticsearch:logstash:1.5.0:*:*:*:*:*:*:*
elasticsearch logstash 1.5.1 cpe:2.3:a:elasticsearch:logstash:1.5.1:*:*:*:*:*:*:*
elasticsearch logstash 1.5.2 cpe:2.3:a:elasticsearch:logstash:1.5.2:*:*:*:*:*:*:*
elasticsearch logstash 1.5.3 cpe:2.3:a:elasticsearch:logstash:1.5.3:*:*:*:*:*:*:*

References for CVE-2015-5619

cvelogic Threat Intelligence