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CVE-2021-20777

Quick assessment

Affected
G.U. CO., LTD. GU App for Android
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

极优商贸 GU App是中国极优商贸公司的一款购物APP。 GU App 4.8.0至5.0.2版本存在权限许可和访问控制问题漏洞，远程攻击者可利用该漏洞引导用户访问任意网站。

AI Predicted 5.3 Difficulty: Trivial EPSS 0.87% · P58

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2021-20777

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Improper authorization in handler for custom URL scheme vulnerability in GU App for Android versions from 4.8.0 to 5.0.2 allows a remote attacker to lead a user to access an arbitrary website via the vulnerable App.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
GU App 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
极优商贸 GU App是中国极优商贸公司的一款购物APP。 GU App 4.8.0至5.0.2版本存在权限许可和访问控制问题漏洞，远程攻击者可利用该漏洞引导用户访问任意网站。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
G.U. CO., LTD. GU App for Android versions from 4.8.0 to 5.0.2 -

II. Public POCs for CVE-2021-20777

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-20777

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Vendor Advisories for CVE-2021-20777 (1)

V. Comments for CVE-2021-20777

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