XSS in Nextcloud Desktop
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.014 (69.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Nextcloud Desktop
- N/a Desktop Client — versions 2.6.5
Weakness classification (CWE)
Public proof-of-concept exploits
References
- support@hackerone.com (Exploit, Third Party Advisory, x_refsource_MISC)
- support@hackerone.com (x_refsource_MISC, Broken Link, Vendor Advisory)
- support@hackerone.com (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
Frequently asked questions
- What is CVE-2020-8189?
- CVE-2020-8189 is a medium-severity vulnerability in Nextcloud Desktop, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-08-21.
- How severe is CVE-2020-8189?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2020-8189 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.