Privilege escalation in Getoutline Outline
CVE-2025-64487
Outline is a service that allows for collaborative documentation. Prior to 1.1.0, a privilege escalation vulnerability exists in the Outline document management system due to inconsistent authorization checks between user and group membership management endpoints. This vulnerability is fixed in 1.1.0.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (9.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Getoutline Outline
- Outline — versions <= 1.0.1
Weakness classification (CWE)
References
- github.com/outline/outline/security/advisories/GHSA-c8xf-3j86-7686 (Vendor Advisory)
- github.com/outline/outline/releases/tag/v1.1.0 (Release Notes)
Frequently asked questions
- What is CVE-2025-64487?
- CVE-2025-64487 is a high-severity vulnerability in Getoutline Outline, classified under Improper Privilege Management. CVSS score: 7.6/10. Published 2026-02-11.
- How severe is CVE-2025-64487?
- High severity. CVSS v3 base score is 7.6 out of 10.