CVE-2020-8189: nextcloud desktop Cross-site Scripting
CVSS: 5.4v3.1MediumModified
AliasesUBUNTU-CVE-2020-8189DEBIAN-CVE-2020-8189
Published 21-08-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-8189 is a medium (CVSS 5.4) Cross-site Scripting vulnerability in nextcloud desktop. EPSS estimates a 1.40% chance of exploitation in the next 30 days, higher than 72.1% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
5.4/10
010
Medium · v3.1 (NVD)EPSS score
1.40%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 21-08-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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 metrics
4 scores · 3 sources · 2 versionsMedium 5.4Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated5.4MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- OSV · DebianEcosystem advisory · calculated5.4MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Low 3.5Preferred score · NVD (NIST)
AV:N/AC:M/Au:S/C:N/I:P/A:NSourcesSingle source
EPSS trend
Probability
1.40%
Chance of exploitation in the next 30 days
Percentile
72%
Versus all other CVEs
30-day change
0.00 pp
From 1.40% on 20-09-2026
20-09-202620-10-2026
EPSS score1.40%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (hackerone.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Debian1 product
- nextcloud-desktop< 3.0.1-1
Nextcloud1 product
- desktop< 2.6.5
Ubuntu1 product
- nextcloud-desktopAll versions (No fix recorded)
3 vendors · 3 products
