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CVE-2020-36655

27
FAUCET Score

CVE-2020-36655 is a critical arbitrary code execution vulnerability affecting Yii Yii2 Gii versions prior to 2.2.2, allowing remote attackers to embed malicious PHP code into model files via the Generator.php messageCategory field. With a CVSS score of 8.8 (High), this vulnerability presents a significant risk due to its low attack complexity and potential for complete compromise of confidentiality, integrity, and availability. Despite its severity, there is currently no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.2.2CPE matchmatch criteria
cpe:2.3:a:yiiframework:gii:*:*:*:*:*:yii2:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.46%
Probability of exploitation in next 30 days
EPSS Percentile
70.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0146 is in the 68th percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

composerpatch availablevia ghsa
Product: yiisoft/yii2-giiFixed in: 2.2.2

Vendor Advisories (1)

composerGHSA-3mpg-q26j-83j5high

Command injection in yiisoft/yii2-gii

Jan 21, 2023

References

github.com / yiisoft/yii2-gii/issues/433
ExploitIssue TrackingThird Party Advisory
lab.wallarm.com / yii2-gii-remote-code-execution
ExploitMitigationThird Party Advisory