How severe is CVE-2025-64487?

CVE-2025-64487 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2025-64487 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-64487?

CVE-2025-64487 affects Getoutline Outline. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-64487?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-64487 have an EU (EUVD) identifier?

Yes. CVE-2025-64487 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207025.

When was CVE-2025-64487 published?

CVE-2025-64487 was published on 2026-02-11 and last updated on 2026-06-17.

CVE-2025-64487

CVE-2025-64487 is a high-severity vulnerability in Getoutline Outline with a CVSS 3.x base score of 7.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-269.

Key facts

Severity: High (CVSS 3.x base score 7.6)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-207025
Weakness: CWE-269
Affected product: Getoutline Outline
Published: 2026-02-11
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-64487?: CVE-2025-64487 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2025-64487 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-64487?: CVE-2025-64487 affects Getoutline Outline. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-64487?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-64487 have an EU (EUVD) identifier?: Yes. CVE-2025-64487 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207025.
When was CVE-2025-64487 published?: CVE-2025-64487 was published on 2026-02-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:getoutline:outline:*:*:*:*:*:*:*:*

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