Vulnerability record · CVE-2023-48302 · published 21 November 2023

CVE-2023-48302: Nextcloud server cross-site scripting vulnerability

Nextcloud · Nextcloud Server

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.

5.4 CVSS 3.1 Medium EPSS 0.57% · top 55.0% CWE-79 · Cross-site scripting

5.4CVSS 3.1 base score

0.57%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

6References

17 Jun 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Nextcloud Server Nextcloud

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
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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-48302), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.