No exploitation reportedFix available

CVE-2018-6009

Q: Is CVE-2018-6009 actively exploited?

Active exploitation of CVE-2018-6009 has not been confirmed. Its EPSS score was 0.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2018-6009?

CVE-2018-6009 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2018-01-22
WeaknessCWE-352

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In Yii Framework 2.x before 2.0.14, the switchIdentity function in web/User.php did not regenerate the CSRF token upon a change of identity.

Timeline

dates in UTC

2018-01-2222:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-6009?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-6009?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Yiiframework

Branch	Affected	Fixed in	Source
2.0	= 2.0.0	no fix published	NVD
2.0	= 2.0.1	no fix published	NVD
2.0	= 2.0.2	no fix published	NVD
2.0	= 2.0.3	no fix published	NVD
2.0	= 2.0.4	no fix published	NVD
2.0	= 2.0.5	no fix published	NVD
2.0	= 2.0.6	no fix published	NVD
2.0	= 2.0.7	no fix published	NVD
2.0	= 2.0.8	no fix published	NVD
2.0	= 2.0.9	no fix published	NVD
2.0	= 2.0.10	no fix published	NVD
2.0	= 2.0.11	no fix published	NVD

yiisoft/yii2

Branch	Affected	Fixed in	Source
2.0	≥ 2.0, < 2.0.14	2.0.14	OSV

yiisoft/yii2-dev

Branch	Affected	Fixed in	Source
2.0	≥ 2.0, < 2.0.14	2.0.14	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

github.comPatch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.08.8read 2026-10-23
NVDCVSS 2.06.8read 2026-10-23
NVDweakness (CWE)CWE-352read 2026-10-23
FIRST EPSSEPSS score0.6 %2026-10-22
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2018-01-22
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2018-6009?

In Yii Framework 2.x before 2.0.14, the switchIdentity function in web/User.php did not regenerate the CSRF token upon a change of identity.

Is CVE-2018-6009 actively exploited?

Active exploitation of CVE-2018-6009 has not been confirmed. Its EPSS score was 0.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-6009?

CVE-2018-6009 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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