Improper Access Control in Buttercup Browser Extension by Buttercup
CVE-2017-20199
Key Information:
- Vendor
Buttercup
- Vendor
- CVE Published:
- 16 August 2025
Badges
What is CVE-2017-20199?
A security vulnerability in the Buttercup browser extension allows for improper access controls. This flaw can potentially lead to unwanted access to sensitive data, as the functionality that handles access permissions is improperly configured. The vulnerability can be exploited remotely, but the complexity of executing such an attack is considered high, making successful exploitation difficult. Users are advised to update to version 1.0.1 or later to mitigate this risk, as the product versions preceding this update are no longer supported and vulnerable.

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Affected Version(s)
buttercup-browser-extension 0.14.0
buttercup-browser-extension 0.14.1
buttercup-browser-extension 0.14.2
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.
References
CVSS V4
Timeline
- π‘
Public PoC available
- πΎ
Exploit known to exist
Vulnerability published
