CVE-2023-39955

low-risk
Published 2023-08-10

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.

Do I need to act?

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0.70% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.5/10 Low
NETWORK / LOW complexity

Affected Products (1)

Notes

Affected Vendors

Nextcloud

References (6)

Patch https://github.com/nextcloud/notes/pull/1031
Patch https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6g88-3...
Third Party Advisory https://hackerone.com/reports/1924355
Patch https://github.com/nextcloud/notes/pull/1031
Patch https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6g88-3...
Third Party Advisory https://hackerone.com/reports/1924355
23
/ 100
low-risk
Severity 16/34 · Moderate
Exploitability 2/34 · Minimal
Exposure 5/34 · Minimal