CVE-2020-8155 json
An outdated 3rd party library in the Files PDF viewer for Nextcloud Server 18.0.2 caused a Cross-site scripting vulnerability when opening…
published 2020-05-12 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-29048
- cvss
- 5.4
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 66%
- public exploits
- 0
- none known
Summary
An outdated 3rd party library in the Files PDF viewer for Nextcloud Server 18.0.2 caused a Cross-site scripting vulnerability when opening a malicious PDF.
Patch / fix
- nextcloud nextcloud_server 18.0.3
- nextcloud Package Hub 15 SP2, Package Hub 15 SP1, Package Hub 12 +2 more 20.0.0-bp152.2.3.1
- nextcloud openSUSE Leap 15.1 18.0.4-lp151.2.6.1
- nextcloud Package Hub 15 SP1 18.0.4-bp151.3.9.1
- nextcloud Package Hub 12 18.0.4-22.1
opensuse advisories openSUSE-SU-2020:1652-1openSUSE-SU-2020:0670-1openSUSE-SU-2020:0668-1openSUSE-SU-2020:0667-1
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2020-8155 updated
nextcloud: multiple vulnerabilities
-
Red Hat All currently supported Red Hat productsnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
1.14% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 3.5 | AV:N/AC:M/Au:S/C:N/I:P/A:N |
Affected products
- n/a Nextcloud Server
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
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%40lists.fedoraproject.org/message/KC6HLX5SG4PZO6Y54D2LFJ4ATG76BKOP/
vendor-advisory
-
nextcloud.com
/security/advisory/?id=NC-SA-2020-019
vendor-advisory
Sources
- CVE List CVE-2020-8155
- NVD CVE-2020-8155
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.