CVE-2018-15727

Grafana 2.x, 3.x, and 4.x before 4.6.4 and 5.x before 5.2.3 allows authentication bypass because an attacker can generate a valid "remember me" cookie knowing only a username of an LDAP or OAuth user.

Published: 2018-08-29 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]

NVD Status：Modified，CVE State: published

View at NVD, CVE.org, EUVD

Threat Intelligence & Risk Assessment for CVE-2018-15727

EPSS CVSS CWE GHSA Affected OS Tracker

Conclusion & alert: CVE-2018-15727 is rated High Risk (68.9/100): CVSS Critical severity, with high exploitation likelihood (EPSS 64.28%, 99th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize 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-2018-15727

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	79.55%	64.28%	-15.27%
2	2026-03-15	80.08%	79.55%	-0.53%
3	2026-03-04	—	80.08%	—

Full EPSS history (55 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-15727

CVSS metrics for this CVE.

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.8	3.0	CRITICAL	`CVSS:3.0/AV:N/AC:L/PR:N/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: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: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.	3.9	5.9	[email protected]
7.5	2.0	HIGH	`AV:N/AC:L/Au:N/C:P/I:P/A:P` 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:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	10.0	6.4	[email protected]

Weakness enumeration for CVE-2018-15727

CWE-287 MITRE ↗

GitHub Security Advisory for CVE-2018-15727

GHSA-rgjg-66cx-5x9m · Severity: critical · Ecosystem: go — Grafana Authentication Bypass

OS Trackers for CVE-2018-15727

vendor	priority	summary	link
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2018-15727
`suse`	low	CVE-2018-15727 severity low: SUSE including 166 source package names (ardana-ansible-8.0+git.1566374355.c509923-3.67.3, ardana-glance-8.0+git.1566376789.be0fe01-3.17.3, …), 349 product×package rows across 9 product lines (HPE Helion OpenStack 8, SUSE Enterprise Storage 4, … (9 product lines)): Fixed 346, Known Not Affected 3.	https://www.suse.com/security/cve/CVE-2018-15727/
`ubuntu`	low	CVE-2018-15727 low priority: Ubuntu including 1 source packages (grafana), 17 status rows across 17 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 15, needed 1, released 1.	https://ubuntu.com/security/CVE-2018-15727

Affected software / configurations for CVE-2018-15727

Vendor	Product	Version	Raw CPE
grafana	grafana	>= 2.0.0, <= 2.1.2	cpe:2.3:a:grafana:grafana::::::::
grafana	grafana	>= 3.0.0, <= 3.1.1	cpe:2.3:a:grafana:grafana::::::::
grafana	grafana	>= 4.0.0, < 4.6.4	cpe:2.3:a:grafana:grafana::::::::
grafana	grafana	>= 5.0.0, < 5.2.3	cpe:2.3:a:grafana:grafana::::::::
redhat	ceph_storage	3.0	cpe:2.3:a:redhat:ceph_storage:3.0:::::::*

References for CVE-2018-15727

URL	Tags
http://www.securityfocus.com/bid/105184	Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2018:3829	Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0019	Third Party Advisory
https://grafana.com/blog/2018/08/29/grafana-5.2.3-and-4.6.4-released-with-important-security-fix/	Patch Vendor Advisory

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