CVE-2021-20777 Missing authorization in GU App for Android
A remote attacker can trick users into accessing arbitrary websites via the app's custom URL scheme due to improper authorization checks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-20777?
CVE-2021-20777 is a medium-severity missing authorization vulnerability in G.U. CO., LTD. GU App for Android, published on 7 Jul 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2021-20777?
It affects 1 product.
Products include Gu-Global Gu.
How do I fix CVE-2021-20777?
No fix has been published for CVE-2021-20777 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-20777 being exploited?
There is no known exploitation of CVE-2021-20777 in the wild and no public exploit code.
Sources
Also known as GHSA-q6p4-2q7c-4vw7.