Detections
Analytics

CVE-2021-22878

medium

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`.

References

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/

https://github.com/nextcloud/server/pull/25234

https://nextcloud.com/security/advisory/?id=NC-SA-2021-005

https://hackerone.com/reports/896522

Details

Source: Mitre, NVD

Published: 2021-03-03

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 3.5

Vector: CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N

Severity: Low

CVSS v3

Base Score: 4.8

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Severity: Medium

EPSS

EPSS: 0.00368