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Fencer Vulns
medium 4.6

CVE-2022-39331 json

Cross-site Scripting (XSS) in Nexcloud Desktop Client

published 2022-11-25 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-41808

cvss
4.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

Nexcloud desktop is the Desktop sync client for Nextcloud. An attacker can inject arbitrary HyperText Markup Language into the Desktop Client application in the notifications. It is recommended that the Nextcloud Desktop client is upgraded to 3.6.1. There are no known workarounds for this issue.

Patch / fix

  • nextcloud desktop 3.6.1
  • nextcloud-desktop Debian 14, Debian 13, Debian 12 3.6.1-1

debian advisories DEBIAN-CVE-2022-39331

  • nextcloud-desktop Package Hub 15 SP5, openSUSE Leap 15.5 3.8.0-bp155.2.3.1
  • nextcloud-desktop Package Hub 15 SP4, openSUSE Leap 15.4 3.8.0-bp154.2.3.1

opensuse advisories openSUSE-SU-2023:0171-1openSUSE-SU-2023:0090-1

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-2022-39331 updated cvss 3.5

nextcloud-client: XSS in Desktop Client in the notifications

  • Red Hat All currently supported Red Hat products
    not 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

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

0.94% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • hackerone.com https://hackerone.com/reports/1668028 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 4.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected products

  • nextcloud security-advisories

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

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.