CVE-2017-20199 Buttercup buttercup-browser-extension Vault access control
Attacker can bypass access controls to read or modify vault data in the Buttercup browser extension.
- 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-2017-20199?
CVE-2017-20199 is a low-severity missing authorization vulnerability in buttercup-browser-extension, published on 15 Aug 2025. 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
A vulnerability was found in Buttercup buttercup-browser-extension up to 0.14.2. Affected by this vulnerability is an unknown functionality of the component Vault Handler. The manipulation results in improper access controls. The attack may be performed from a remote location. A high complexity level is associated with this attack. The exploitation appears to be difficult. The exploit has been made public and could be used. Upgrading to version 1.0.1 addresses this issue. The patch is identified as 89. Upgrading the affected component is recommended. This vulnerability only affects products that are no longer supported by the maintainer.
Which versions are affected by CVE-2017-20199?
It affects 1 product.
Products include Buttercup Buttercup.
How do I fix CVE-2017-20199?
No fix has been published for CVE-2017-20199 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-2017-20199 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-20199 exists.
Sources
Also known as GHSA-639h-gpc4-26xv.