CVE-2025-64487
Undergoing Analysis Undergoing Analysis - In Progress
Privilege Escalation in Outline Document Management System Before

Publication date: 2026-02-11

Last updated on: 2026-02-20

Assigner: GitHub, Inc.

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.
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Meta Information
Published
2026-02-11
Last Modified
2026-02-20
Generated
2026-06-16
AI Q&A
2026-02-11
EPSS Evaluated
2026-06-15
NVD
CVE-2025-64487
EUVD
EUVD-2025-207025
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
getoutline outline to 1.1.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-269 The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
Attack-Flow Graph
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Executive Summary

CVE-2025-64487 is a high-severity privilege escalation vulnerability in the Outline document management system affecting versions up to and including v1.0.1.

The vulnerability arises from inconsistent authorization checks between user and group membership management endpoints within the document sharing functionality.

This flaw allows an attacker to escalate privileges improperly due to inadequate verification of user permissions, classified under CWE-269 (Improper Privilege Management).

The issue is fixed in version 1.1.0 by implementing proper authorization checks to prevent unauthorized privilege escalation.

Impact Analysis

This vulnerability can allow an attacker to escalate their privileges within the Outline document management system.

As a result, the attacker could gain unauthorized access to documents or perform actions reserved for higher-privileged users.

This could lead to unauthorized disclosure or modification of sensitive information.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

To mitigate the privilege escalation vulnerability in the Outline document management system, you should upgrade to version 1.1.0 or later, where the issue has been fixed by implementing proper authorization checks.

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