Vulnerability Description
Nextcloud Server prior to 20.0.6 is vulnerable to reflected cross-site scripting (XSS) due to lack of sanitization in `OC.Notification.show`.
CVSS Score
4.8
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | Nextcloud Server | < 20.0.6 |
| Fedoraproject | Fedora | 34 |
Related Weaknesses (CWE)
References
- https://github.com/nextcloud/server/pull/25234PatchThird Party Advisory
- https://hackerone.com/reports/896522ExploitIssue TrackingThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://nextcloud.com/security/advisory/?id=NC-SA-2021-005Vendor Advisory
- https://github.com/nextcloud/server/pull/25234PatchThird Party Advisory
- https://hackerone.com/reports/896522ExploitIssue TrackingThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://nextcloud.com/security/advisory/?id=NC-SA-2021-005Vendor Advisory
FAQ
What is CVE-2021-22878?
CVE-2021-22878 is a vulnerability with a CVSS score of 4.8 (MEDIUM). Nextcloud Server prior to 20.0.6 is vulnerable to reflected cross-site scripting (XSS) due to lack of sanitization in `OC.Notification.show`.
How severe is CVE-2021-22878?
CVE-2021-22878 has been rated MEDIUM with a CVSS base score of 4.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-22878?
Check the references section above for vendor advisories and patch information. Affected products include: Nextcloud Nextcloud Server, Fedoraproject Fedora.