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Vulnerabilities

Vulnerability · CVE-2025-64487

Outline is a service that allows for collaborative documentation.

Published Feb 11, 2026 · catalog updated Feb 11, 2026 · Outline is a service

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-64487. EPSS is 0.23%. Act only if a listed version of Outline is a service is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Outline is a service).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.6
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.23%
Remediation
Advisory link
Affected products
vendor outline outline ≤ 1.0.1

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor outline outline ≤ 1.0.1≤ 1.0.1

How to fix CVE-2025-64487

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-64487. EPSS is 0.23%. Act only if a listed version of Outline is a service is installed.

Which versions are affected?

Compare what you have installed with outline outline ≤ 1.0.1 ≤ 1.0.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.23%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 11, 2026 · EUVD

    Detected

    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.

  2. Feb 11, 2026 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2025-64487

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-64487

    30-day exploitation probability 0.23%

    first.org
  • EUVDVulnerability recordEUVD-2025-207025

    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 vulnerabil

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 6, 2026
  • CVE.orgNov 4, 2026
  • EUVDNov 3, 2026