CVE-2021-20777

4.3 mediumEPSS 0.9%

Medium (4.3) in gu-global gu. EPSS 0.9% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

4.3 medium

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

EPSS: 0.9% chance of exploitation in the next 30 days; higher than 58% of CVEs (scores of 2026-10-31)
CWE: CWE-862
Published: 2021-07-07
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

gu-global:gu

References

https://jvn.jp/en/jp/JVN25850723/index.html
https://jvn.jp/en/jp/JVN25850723/index.html

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