CVE-2023-48302

Nextcloud Server vulnerable to Self XSS when pasting HTML into Text app with Ctrl+Shift+V

Description

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.13, 26.0.8, and 27.1.3 of Nextcloud Server and Nextcloud Enterprise Server, when a user is tricked into copy pasting HTML code without markup (Ctrl+Shift+V) the markup will actually render. Nextcloud Server and Nextcloud Enterprise Server versions 25.0.13, 26.0.8, and 27.1.3 contain a fix for this issue. As a workaround, disable app text.

Category

3.5
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.39%
Vendor Advisory github.com
Affected: nextcloud security-advisories
Published at:
Updated at:

References

Link Tags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-p7g9-x25m-4h87 vendor advisory
https://github.com/nextcloud/text/pull/4877 patch
https://hackerone.com/reports/2211561 permissions required

Frequently Asked Questions

What is the severity of CVE-2023-48302?
CVE-2023-48302 has been scored as a low severity vulnerability.
How to fix CVE-2023-48302?
To fix CVE-2023-48302, 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-2023-48302 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-48302 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-48302?
CVE-2023-48302 affects nextcloud security-advisories.
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