How severe is CVE-2015-5619?

CVE-2015-5619 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2015-5619 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-5619?

CVE-2015-5619 primarily affects Elastic Logstash. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-5619?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2015-5619 published?

CVE-2015-5619 was published on 2017-08-09 and last updated on 2026-06-17.

CVE-2015-5619

CVE-2015-5619 is a medium-severity vulnerability in Elastic Logstash with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Elastic Logstash
Published: 2017-08-09
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2015-5619?: CVE-2015-5619 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2015-5619 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-5619?: CVE-2015-5619 primarily affects Elastic Logstash. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-5619?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-5619 published?: CVE-2015-5619 was published on 2017-08-09 and last updated on 2026-06-17.

References

Affected products (9)

cpe:2.3:a:elastic:logstash:1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:logstash:1.4.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:logstash:1.4.2:*:*:*:*:*:*:*
cpe:2.3:a:elasticsearch:logstash:1.4.3:*:*:*:*:*:*:*
cpe:2.3:a:elasticsearch:logstash:1.4.4:*:*:*:*:*:*:*
cpe:2.3:a:elasticsearch:logstash:1.5.0:*:*:*:*:*:*:*
cpe:2.3:a:elasticsearch:logstash:1.5.1:*:*:*:*:*:*:*
cpe:2.3:a:elasticsearch:logstash:1.5.2:*:*:*:*:*:*:*
cpe:2.3:a:elasticsearch:logstash:1.5.3:*:*:*:*:*:*:*

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