CVE-2025-66554

CWE-79 — Cross-site Scripting (XSS)2 documents2 sources
Severity
5.4MEDIUM
EPSS
0.0%
top 92.32%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Nextcloud Security-advisoriesNextcloud Contacts
Timeline
PublishedDec 5

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:NExploitability: 2.1 | Impact: 1.4

Affected Packages2 packages

▶NVDnextcloud/contacts5.0.0 — 5.5.4+2
▶CVEListV5nextcloud/security-advisories< 5.5.4+2

Patches

Patch: github.com ↗Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

1
CVEList
Nextcloud Contacts vulnerable to Stored XSS in contacts app via organisation and title field↗2025-12-05
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