CVE-2020-8294

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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.4 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
hackeroneCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 59%
VendorProductVersion
nextcloudnextcloud_server
𝑥
< 18.0.11
nextcloudnextcloud_server
19.0.0 ≤
𝑥
< 19.0.5
nextcloudnextcloud_server
20.0.0 ≤
𝑥
< 20.0.2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://hackerone.com/reports/1023787
https://nextcloud.com/security/advisory/?id=NC-SA-2021-002
https://hackerone.com/reports/1023787
https://nextcloud.com/security/advisory/?id=NC-SA-2021-002