How severe is CVE-2018-6009?

CVE-2018-6009 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-6009 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6009?

CVE-2018-6009 primarily affects Yiiframework. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-6009?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-6009 published?

CVE-2018-6009 was published on 2018-01-22 and last updated on 2026-06-17.

CVE-2018-6009

CVE-2018-6009 is a high-severity vulnerability in Yiiframework with a CVSS 3.x base score of 8.8. 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-352.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Yiiframework
Published: 2018-01-22
Last modified: 2026-06-17

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.

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.
How severe is CVE-2018-6009?: CVE-2018-6009 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-6009 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6009?: CVE-2018-6009 primarily affects Yiiframework. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-6009?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-6009 published?: CVE-2018-6009 was published on 2018-01-22 and last updated on 2026-06-17.

References

https://github.com/yiisoft/yii2/commit/6c0540aa2d6e0fe0fa89e4fd35bba4be5d6cece7

Affected products (20)

cpe:2.3:a:yiiframework:yiiframework:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.0:alpha:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.0:beta:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.0:rc:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.1:*:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.2:*:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.3:*:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.4:*:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.5:*:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.6:*:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.7:*:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.8:*:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.9:*:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.10:*:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.11:*:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.11.1:*:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.11.2:*:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.12:*:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.13:*:*:*:*:*:*:*
cpe:2.3:a:yiiframework:yiiframework:2.0.13.1:*:*:*:*:*:*:*

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