Improper Access Control in Buttercup Browser Extension by Buttercup
CVE-2017-20199

2.3LOW

Key Information:

Vendor

Buttercup

Vendor
CVE Published:
16 August 2025

Badges

πŸ‘Ύ Exploit Exists🟑 Public PoC

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

Score:
2.3
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟑

    Public PoC available

  • πŸ‘Ύ

    Exploit known to exist

  • Vulnerability published

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