Vulnerability Details : CVE-2023-39955
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.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2023-39955
- cpe:2.3:a:nextcloud:notes:*:*:*:*:*:nextcloud:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-39955
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 35 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-39955
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.1
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
2.8
|
2.7
|
NIST | |
|
3.5
|
LOW | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N |
2.1
|
1.4
|
GitHub, Inc. |
CWE ids for CVE-2023-39955
-
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.Assigned by: security-advisories@github.com (Primary)
References for CVE-2023-39955
-
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6g88-37x7-4vw6
Notes attachment render HTML in preview mode · Advisory · nextcloud/security-advisories · GitHubPatch;Vendor Advisory
-
https://hackerone.com/reports/1924355
Just a moment...Third Party Advisory
-
https://github.com/nextcloud/notes/pull/1031
fix: Proper response for attachment endpoint by juliushaertl · Pull Request #1031 · nextcloud/notes · GitHubPatch
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