XSS in Nextcloud Server
CVE-2020-8155
An outdated 3rd party library in the Files PDF viewer for Nextcloud Server 18.0.2 caused a Cross-site scripting vulnerability when opening a malicious PDF.
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: 0.011 (65.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Nextcloud Server
- Nextcloud Server — versions 18.0.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- nextcloud.com/security/advisory/ (Vendor Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-05/msg00037.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2020-05/msg00038.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2020-05/msg00040.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2020-10/msg00019.html (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2020-8155?
- CVE-2020-8155 is a medium-severity vulnerability in Nextcloud Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-05-12.
- How severe is CVE-2020-8155?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2020-8155 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.