What’s Vulnerable › Vulnerabilities

CVE-2017-20199: Buttercup buttercup-browser-extension Vault access control

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-08-16 · updated 2026-06-17
• Weakness: CWE-266

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.

Affected products

• buttercup-browser-extension: before 1.0.1 — fixed in 1.0.1

How to fix

Upgrade to a fixed version: buttercup-browser-extension 1.0.1. Check the vendor advisory for mitigations.

References

• https://github.com/buttercup/buttercup-browser-extension/issues/92
• https://github.com/buttercup/buttercup-browser-extension/issues/92#issuecomment-358449755
• https://github.com/buttercup/buttercup-browser-extension/issues/92#issuecomment-372991430
• https://github.com/buttercup/buttercup-browser-extension/pull/89
• https://github.com/buttercup/buttercup-browser-extension/releases/tag/v1.0.1
• https://vuldb.com/?ctiid.319969
• https://vuldb.com/?id.319969
• https://vuldb.com/?submit.628170
• https://github.com/buttercup/buttercup-browser-extension/issues/92#issuecomment-372991430

Get alerted when CVE-2017-20199 or the next vulnerability affects your stack