CVE-2025-66554

Nextcloud Contacts vulnerable to Stored XSS in contacts app via organisation and title field

State: Published
Severity: 3.5 Low
Published: Dec 5, 2025
Updated: Dec 8, 2025
Reserved: Dec 4, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	3.5 Low	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
security-advisoriesnextcloud	>= 7.0.0-alpha.1, < 7.2.5Affected >= 6.0.0-alpha1, < 6.0.6Affected < 5.5.4Affected

References

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