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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.014 (71.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
- Nextcloud Desktop
- Desktop Client — versions 2.6.5
Weakness classification (CWE)
Public proof-of-concept exploits
References
- hackerone.com/reports/685552 (Exploit, Third Party Advisory)
- nextcloud.com/security/advisory/ (Broken Link, Vendor Advisory)
- security.gentoo.org/glsa/202009-09 (vendor-advisory, Third Party Advisory)
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.