CVE-2023-39955

LOW

Nextcloud Notes 4.4.0-4.7.9 - Stored Cross-Site Scripting via HTML Note Preview

Title source: llm
STIX 2.1

Description

Notes is a note-taking app for Nextcloud, an open-source cloud platform. Starting in version 4.4.0 and prior to version 4.8.0, when creating a note file with HTML, the content is rendered in the preview instead of the file being offered to download. Nextcloud Notes app version 4.8.0 contains a patch for the issue. No known workarounds are available.

References (3)

Core 3
Core References
Third Party Advisory x_refsource_misc
https://hackerone.com/reports/1924355

Scores

CVSS v3 3.5
EPSS 0.0088
EPSS Percentile 75.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
nextcloud/notes 4.4.0 - 4.8.0
Published Aug 10, 2023
Tracked Since Feb 18, 2026