CVE-2023-48302 - CVE House

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Status published Low CVE-2023-48302

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

3.5 CVSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

nextcloud

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Affected Software

security-advisories

Vulnerable Versions:

>= 25.0.0, < 25.0.13, >= 26.0.0, < 26.0.8, >= 27.0.0, < 27.1.3

Timeline

Official Publish: November 21st, 2023

Last Modified: August 2nd, 2024

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1189 Drive-by Compromise

T1059.007 JavaScript

T1539 Steal Web Session Cookie

T1213 Data from Information Repositories

T1567 Exfiltration Over Web Service

T1491.001 Defacement