CVE-2021-32733
A cross-site scripting vulnerability is present in versions prior to 19.0.13, 20.0.11, and 21.0.3.
Does this matter?
Lower severity and a low EPSS score (1.11%). Track it; it rarely justifies an emergency change on its own.
Description
Nextcloud Text is a collaborative document editing application that uses Markdown. A cross-site scripting vulnerability is present in versions prior to 19.0.13, 20.0.11, and 21.0.3. The Nextcloud Text application shipped with Nextcloud server used a `text/html` Content-Type when serving files to users. Due the strict Content-Security-Policy shipped with Nextcloud, this issue is not exploitable on modern browsers supporting Content-Security-Policy. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. As a workaround, use a browser that has support for Content-Security-Policy.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 1.11% probability · 64th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- nextcloud/nextcloud server
- Source
- security-advisories@github.com
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-x4w3-jhcr-57pqThird Party Advisory
- https://github.com/nextcloud/text/pull/1689Patch, Third Party Advisory
- https://hackerone.com/reports/1241460Permissions Required
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-x4w3-jhcr-57pqThird Party Advisory
- https://github.com/nextcloud/text/pull/1689Patch, Third Party Advisory
- https://hackerone.com/reports/1241460Permissions Required
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.