CVE-2015-5378

Logstash 1.5.x before 1.5.3 and 1.4.x before 1.4.4 allows remote attackers to read communications between Logstash Forwarder agent and Logstash server.

Published: 2017-06-27 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-5378 is rated Moderate Risk (54.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.67%). 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-2015-5378

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 2025-11-16 0.98% 0.67% -0.31%
2 2025-08-26 1.19% 0.98% -0.21%
3 2025-03-30 — 1.19% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-5378

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/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-2015-5378

Affected software / configurations for CVE-2015-5378

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 1.5.0 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:*:*:*:*:*:*:*

References for CVE-2015-5378

cvelogic Threat Intelligence