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Self XSS when pasting HTML into Text app with Ctrl+Shift+V

Low
nickvergessen published GHSA-p7g9-x25m-4h87 Nov 21, 2023

Package

Server (Nextcloud)

Affected versions

>= 25.0.0, >= 26.0.0, >= 27.0.0

Patched versions

25.0.13, 26.0.8, 27.1.3
Server (Nextcloud Enterprise)
>= 25.0.0, >= 26.0.0, >= 27.0.0
25.0.13, 26.0.8, 27.1.3

Description

Impact

When a user is tricked into copy pasting HTML code without markup (Ctrl+Shift+V) the markup will actually render.

Patches

It is recommended that the Nextcloud Server is upgraded to 25.0.13, 26.0.8 or 27.1.3
It is recommended that the Nextcloud Enterprise Server is upgraded to 25.0.13, 26.0.8 or 27.1.3

Workarounds

  • Disable app text

References

For more information

If you have any questions or comments about this advisory:

Severity

Low
3.5
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L

CVE ID

CVE-2023-48302

Weaknesses

Credits