Description (CNA)
Nextcloud is an open-source, self-hosted productivity platform. Prior to versions 20.0.13, 21.0.5, and 22.2.0, a file traversal vulnerability makes an attacker able to download arbitrary SVG images from the host system, including user provided files. This could also be leveraged into a XSS/phishing attack, an attacker could upload a malicious SVG file that mimics the Nextcloud login form and send a specially crafted link to victims. The XSS risk here is mitigated due to the fact that Nextcloud employs a strict Content-Security-Policy disallowing execution of arbitrary JavaScript. It is recommended that the Nextcloud Server be upgraded to 20.0.13, 21.0.5 or 22.2.0. There are no known workarounds aside from upgrading.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| nextcloud / security-advisories | affected 20.0.13; affected >= 21.0.0, < 21.0.5; affected < 22.2.0 |
CWE
CWE-23, CWE-434
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jp9c-vpr3-m5rf
- https://github.com/nextcloud/server/pull/28726
- https://hackerone.com/reports/1302155
- https://security.gentoo.org/glsa/202208-17
ADP enrichment
No English description supplied.