Yii2 Gii Cross-site Scripting vulnerability

MEDIUM 5.4CVE-2022-34297 · GHSA-x87m-36g7-6mpw · Published 09/12/2022 · updated 17/06/2026

In short

CVE-2022-34297 is a MEDIUM (CVSS 5.4) vulnerability affecting yiisoft/yii2-gii, gii (yiiframework).
Chance of exploitation in the next 30 days (EPSS): 0.64%, higher than 50.6% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
yiisoft/yii2-gii Packagist	`≤ 2.2.4`	No fix yet
gii yiiframework	`≤ 2.2.4`	No fix yet

Description

Some fields like Message Category (requires I18N enabled) in Model Generator, CRUD Generator or Form Generator, Author Name in Extension Generator, etc. are being cached without sanitisation of their contents when the Preview button is pressed. This leads to possibility of injecting malicious javascript in specified pages by placing it in said fields and caching it by pressing Preview button. On each consequent visit of specified pages malicious javascript will be loaded from server and executed in client's browser.

NVD description

Yii Yii2 Gii through 2.2.4 allows stored XSS by injecting a payload into any field.

References

nvd.nist.gov/vuln/detail/CVE-2022-34297 · ADVISORY
gist.github.com/be4r/b5c48d97ef6726d3ee37f995ee5aac81 · WEB
yiisoft/yii2-gii · WEB
yiiframework.com/doc/guide/2.0/en/start-gii · WEB

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Package

Affected versions

Patched versions

yiisoft/yii2-gii

Packagist

≤ 2.2.4

No fix yet

gii

yiiframework

≤ 2.2.4

No fix yet

Description

NVD description

Yii Yii2 Gii through 2.2.4 allows stored XSS by injecting a payload into any field.