How severe is CVE-2020-36655?

CVE-2020-36655 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-36655 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-36655?

CVE-2020-36655 affects Yiiframework Gii. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-36655?

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-2020-36655 published?

CVE-2020-36655 was published on 2023-01-21 and last updated on 2026-06-17.

CVE-2020-36655

CVE-2020-36655 is a high-severity vulnerability in Yiiframework Gii 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-94.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Yiiframework Gii
Published: 2023-01-21
Last modified: 2026-06-17

Description

Yii Yii2 Gii before 2.2.2 allows remote attackers to execute arbitrary code via the Generator.php messageCategory field. The attacker can embed arbitrary PHP code into the model file.

Frequently asked questions

What is CVE-2020-36655?: Yii Yii2 Gii before 2.2.2 allows remote attackers to execute arbitrary code via the Generator.php messageCategory field. The attacker can embed arbitrary PHP code into the model file.
How severe is CVE-2020-36655?: CVE-2020-36655 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-36655 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-36655?: CVE-2020-36655 affects Yiiframework Gii. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-36655?: 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-2020-36655 published?: CVE-2020-36655 was published on 2023-01-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:yiiframework:gii:*:*:*:*:*:yii2:*:*

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