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CVE-2025-66554

nvd nist
Published: Dec 5, 2025Modified: Jun 17, 2026

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5.4
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Exploitability: 2.3 / Impact: 2.7
Source: NVD

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.

Affected (3)

Products: Nextcloud: Contacts
Nextcloud
1 product
Contacts
Configuration A
3 vulnerable
Vulnerable SoftwareAffected Versions
Nextcloud
Contacts
From 5.0.0 to 5.5.4
Contacts
From 6.0.0 to 6.0.6
Contacts
From 7.0.0 to 7.2.5

Related CWEs

CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (4)

Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
Issue TrackingPatch
Source: security-advisories@github.com
PatchVendor Advisory
Source: security-advisories@github.com
Permissions RequiredVendor Advisory

Timeline

No history available yet.