CVE-2018-3831

Elasticsearch Alerting and Monitoring in versions before 6.4.1 or 5.6.12 have an information disclosure issue when secrets are configured via the API. The Elasticsearch _cluster/settings API, when queried, could leak sensitive configuration information such as passwords, tokens, or usernames. This could allow an authenticated Elasticsearch user to improperly view these details.

Published: 2018-09-19 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-3831 is rated Moderate Risk (63.6/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.98%). EPSS rose +1.17% over the last day, indicating growing attacker interest. 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-2018-3831

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 0.82% 1.98% +1.17%
2 2026-04-05 0.86% 0.82% -0.04%
3 2026-03-04 — 0.86% —

Full EPSS history (38 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-3831

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H 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:L)
A normal user session is enough; they don’t have to be admin.
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:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/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:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2018-3831

GitHub Security Advisory for CVE-2018-3831

GHSA-r9fv-qpm9-rj4g · Severity: high · Ecosystem: maven — Exposure of Sensitive Information to an Unauthorized Actor in Elasticsearch

OS Trackers for CVE-2018-3831

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2018-3831
suse medium CVE-2018-3831 severity moderate: SUSE including 1 source package names (elasticsearch), 4 product×package rows across 4 product lines (HPE Helion OpenStack 8, SUSE OpenStack Cloud 7, SUSE OpenStack Cloud 8, SUSE OpenStack Cloud Crowbar 8): Known Not Affected 4. https://www.suse.com/security/cve/CVE-2018-3831/
ubuntu medium CVE-2018-3831 medium priority: Ubuntu including 1 source packages (elasticsearch), 6 status rows across 6 suites (bionic, cosmic, disco, trusty, upstream, xenial): DNE 4, not-affected 1, released 1. https://ubuntu.com/security/CVE-2018-3831

Affected software / configurations for CVE-2018-3831

Vendor Product Version Raw CPE
elastic elasticsearch >= 5.6.0, < 5.6.12 cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*
elastic elasticsearch >= 6.0.0, < 6.4.1 cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*

References for CVE-2018-3831

cvelogic Threat Intelligence