Description
A missing link validation in Nextcloud Server before 20.0.2, 19.0.5, 18.0.11 allows execution of a stored XSS attack using Internet Explorer when saving a 'javascript:' URL in markdown format.
References (2)
Core 2
Core References
Permissions Required, Third Party Advisory x_refsource_confirm
https://hackerone.com/reports/1023787
Vendor Advisory x_refsource_confirm
https://nextcloud.com/security/advisory/?id=NC-SA-2021-002
Scores
CVSS v3
5.4
EPSS
0.0039
EPSS Percentile
60.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Details
CWE
CWE-79
Status
published
Products (1)
nextcloud/nextcloud_server
< 18.0.11
Published
Feb 03, 2021
Tracked Since
Feb 18, 2026