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CVE-2025-66554

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CVE-2025-66554

Published: Dec 5, 2025

Modified: Dec 8, 2025

PUBLISHED

CVSS v3.1

3.5

LOW

Description

Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing. Prior to 5.5.4, 6.0.6, and 7.2.5, a malicious user was able to modify their organisation and title field to load additional CSS files. Javascript and other options were correctly blocked by the content security policy of the Nextcloud Server code. This vulnerability is fixed in 5.5.4, 6.0.6, and 7.2.5.

VendorProductVersions

nextcloud

security-advisories

affected
>= 7.0.0-alpha.1, < 7.2.5
affected
>= 6.0.0-alpha1, < 6.0.6
affected
< 5.5.4

Weaknesses (CWE)

CWE-79

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

References

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