Privilege escalation in Buttercup
CVE-2017-20199
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (37.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Buttercup
- Buttercup Buttercup-Browser-Extension — versions 1.0.1, 0.14.2, 0.14.1
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/buttercup/buttercup-browser-extension/issues/92 (issue-tracking, Issue Tracking)
- github.com/buttercup/buttercup-browser-extension/issues/92 (issue-tracking, Issue Tracking)
- github.com/buttercup/buttercup-browser-extension/issues/92 (issue-tracking, exploit, Issue Tracking)
- github.com/buttercup/buttercup-browser-extension/pull/89 (issue-tracking, Patch, patch)
- github.com/buttercup/buttercup-browser-extension/releases/tag/v1.0.1 (Release Notes, patch)
Frequently asked questions
- What is CVE-2017-20199?
- CVE-2017-20199 is a low-severity vulnerability in Buttercup, classified under Incorrect Privilege Assignment. CVSS score: 3.1/10. Published 2025-08-16.
- How severe is CVE-2017-20199?
- Low severity. CVSS v3 base score is 3.1 out of 10.