CVE-2015-5377

** DISPUTED ** Elasticsearch before 1.6.1 allows remote attackers to execute arbitrary code via...

9.8 CriticalPublic exploitDisputed

Elasticsearch before 1.6.1 allows remote attackers to execute arbitrary code via unspecified vectors involving the transport protocol. NOTE: ZDI appears to claim that CVE-2015-3253 and CVE-2015-5377 are the same vulnerability

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

14.4%Down 39.3 points since Feb 4, 2022

What each source reports

NVD Score used 9.8

Record: CVE-2015-5377
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-74
Updated: 2026-11-02

CVE List No score

Record: CVE-2015-5377
Updated: 2026-11-02

EUVDEUVD-2015-5333 No score

Record: EUVD-2015-5333
Updated: 2026-11-03

GitHub AdvisoriesGHSA-vwpr-g44g-2pf3 9.8

** DISPUTED ** Elasticsearch before 1.6.1 allows remote attackers to execute arbitrary code via...

** DISPUTED ** Elasticsearch before 1.6.1 allows remote attackers to execute arbitrary code via unspecified vectors involving the transport protocol. NOTE: ZDI appears to claim that CVE-2015-3253 and CVE-2015-5377 are the same vulnerability.

Record: GHSA-vwpr-g44g-2pf3
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-74
Updated: 2026-11-02

OSVUBUNTU-CVE-2015-5377 9.8

Record: UBUNTU-CVE-2015-5377
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

elastic elasticsearch

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	fi3ro/CVE-2015-5377	2020-12-28

History

History
Recorded	Changed	Sources
Nov 3, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2015-5377 is a critical vulnerability (CVSS 9.8) in Elastic Elasticsearch, published March 6, 2018. Its validity is disputed. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 14.4%, the 96th percentile.