CVE-2025-66545

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.28% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 20.3% of scored records. A rank, not a probability.

NVD base score

4.3 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2025-12-05 17:44Z9 MO AGO

Last updated

2025-12-08 19:55Z8 MO AGO

Reserved

2025-12-04

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Low (CVSS 3.5)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

Weaknesses

• CWE-707Improper NeutralizationPillar

Data version

5.2

Document digest

a649e75c3828c77c2a91c9289cf3d9f755e7ecaafcef5761c00bad57f3dc5339

• github.comhttps://github.com/nextcloud/security-advisories/security/advisories/GHSA-2vrq-fhmf-c49mx_refsource_CONFIRM
• github.comhttps://github.com/nextcloud/groupfolders/issues/4041x_refsource_MISC
• github.comhttps://github.com/nextcloud/groupfolders/pull/4076x_refsource_MISC
• github.comhttps://github.com/nextcloud/groupfolders/commit/bbe87ebed8da23e9df4db637a76fbc8d36439d58x_refsource_MISC