What is CVE-2021-20777?

CVE-2021-20777 is a medium-severity vulnerability in G.u. Co., Ltd. Gu App For Android, classified under Missing Authorization. CVSS score: 4.3/10. Published 2021-07-07.

How severe is CVE-2021-20777?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in G.u. Co., Ltd. Gu App For Android

CVE-2021-20777

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.

Vulnerability class: Broken Access Control

EPSS: 0.009 (55.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

Affected products

G.u. Co., Ltd. Gu App For Android — versions versions from 4.8.0 to 5.0.2
Gu-global Gu

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

vultures@jpcert.or.jp (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-20777?: CVE-2021-20777 is a medium-severity vulnerability in G.u. Co., Ltd. Gu App For Android, classified under Missing Authorization. CVSS score: 4.3/10. Published 2021-07-07.
How severe is CVE-2021-20777?: Medium severity. CVSS v3 base score is 4.3 out of 10.