CVE-2023-39955

Notes attachment render HTML in preview mode

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.

Category

3.5
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.70% Top 30%
Vendor Advisory github.com
Affected: nextcloud security-advisories
Published at:
Updated at:

References

Link Tags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6g88-37x7-4vw6 patch vendor advisory
https://github.com/nextcloud/notes/pull/1031 patch
https://hackerone.com/reports/1924355 third party advisory

Frequently Asked Questions

What is the severity of CVE-2023-39955?
CVE-2023-39955 has been scored as a low severity vulnerability.
How to fix CVE-2023-39955?
To fix CVE-2023-39955, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-39955 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-39955 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-39955?
CVE-2023-39955 affects nextcloud security-advisories.
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