Medium severity · published Aug 21, 2020
CVE-2020-8189
A cross-site scripting error in Nextcloud Desktop client 2.6.4 allowed to present any html (including local links) when responding with invalid data on the login attempt
5.4
CVSS
1.4%
EPSS
No
On KEV
Description
A cross-site scripting error in Nextcloud Desktop client 2.6.4 allowed to present any html (including local links) when responding with invalid data on the login attempt.
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)1.4% · higher than 72% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DE
Desktop · Nextcloud
before 2.6.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-8189
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-8189
Exploit
https://hackerone.com/reports/685552
Broken Link
https://nextcloud.com/security/advisory/?id=NC-SA-2020-027
Third Party Advisory
https://security.gentoo.org/glsa/202009-09
More from Desktop
9.1
CVE-2024-46958
In Nextcloud Desktop Client 3.13.1 through 3.13.3 on Linux, synchronized files (between the server and client) may become world writable or world readable
8.8
CVE-2023-22472
Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud
8.8
CVE-2021-22879
Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands
7.8
CVE-2024-37885
The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with your computer
7.8
CVE-2022-41882
The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with your computer