Medium severity · published Feb 3, 2021
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…
5.4
CVSS
0.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 60% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NS
Nextcloud Server · Nextcloud
before 18.0.11; 19.0.0 before 19.0.5; 20.0.0 before 20.0.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-8294
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-8294
Permissions Required
https://hackerone.com/reports/1023787
Vendor Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2021-002
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