Medium 6.4Published Dec 3, 2025

CVE-2025-59788Cross-site scripting (XSS) vulnerability in a reachable files_pdfviewer example directory in Nextcloud with versions before 22.2.10.33, 23.0.12.29, 24.0.12.28, 25.0.13.23, 26.0.13.20, 27.1.11.20, 28.…

Updated under an hour ago (Oct 28, 2026, 5:20 AM ET)

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Exploited in the last 30 days

Cross-site scripting (XSS) vulnerability in a reachable files_pdfviewer example directory in Nextcloud with versions before 22.2.10.33, 23.0.12.29, 24.0.12.28, 25.0.13.23, 26.0.13.20, 27.1.11.20, 28.0.14.11, 29.0.16.8, 30.0.17, 31.0.10, and 32.0.1 allows attackers to execute arbitrary JavaScript in the context of a user's browser via a crafted PDF file to viewer.html. This issue is related to CVE-2024-4367, but the root cause of this Nextcloud issue is that the product exposes executable example code on a same-origin basis.

CVSS: 6.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-749
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: mitre
NVD analysis: Analyzed
Record last updated: Dec 11, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Nextcloud Nextcloud nextcloud:nextcloud (from the name)	before 22.2.10.33; from 23 before 23.0.12.29; from 24 before 24.0.12.28; from 25 before 25.0.13.23; from 26 before 26.0.13.20; from 27 before 27.1.11.20; from 28 before 28.0.14.11; from 29 before 29.0.16.8; and 3 more ranges	CNA record
nextcloud nextcloud_server nextcloud:nextcloud_server	from 30.0.0 before 30.0.17; from 31.0.0 before 31.0.10; from 32.0.0 before 32.0.1; from 22.0.0 before 22.2.10.33; from 23.0.0 before 23.0.12.29; from 24.0.0 before 24.0.12.28; from 25.0.0 before 25.0.13.23; from 26.0.0 before 26.0.13.20; and 6 more ranges	NVD

References

References

https://nextcloud.com	product
https://www.redteam-pentesting.de/en/advisories/rt-sa-2025-003/	exploit, third-party-advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-24wp-p865-7j4r	mitigation, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.