CVE-2025-64487

Outline is vulnerable to privilege escalation vulnerability in document sharing

HIGH
7.6
CVSS Score
Published: February 11, 2026 at 08:25 PM UTC
Updated: June 17, 2026 at 09:54 AM UTC
2 products affected across 2 vendorsOutlineOutline

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Severity
HIGH7.6
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

x_refsource_CONFIRMVendor Advisory
Source: cverecord
https://github.com/outline/outline/security/advisories/GHSA-c8xf-3j86-7686
x_refsource_MISCRelease Notes
Source: cverecord
https://github.com/outline/outline/releases/tag/v1.1.0

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.6HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-269

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