Back
CVE-2025-66554
Nextcloud Contacts vulnerable to Stored XSS in contacts app via organisation and title field
Low3.5EPSS 0.27%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Low3.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N |
| NVDNVD · Analyzed | 3.1 | Medium5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.27% · top 81% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.5.
Weakness
Affected products
nextcloud · security-advisories
- affected >= 7.0.0-alpha.1, < 7.2.5
- affected >= 6.0.0-alpha1, < 6.0.6
- affected < 5.5.4
References (4)
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-9v78-cpfc-v6h2 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/nextcloud/contacts/pull/4619 (opens in a new tab)x_refsource_MISC
- https://github.com/nextcloud/contacts/commit/d954d098978dde1f121600e8b994e02f293c68b1 (opens in a new tab)x_refsource_MISC
- https://hackerone.com/reports/3293290 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2025-66554)Record last updated .