CVE-2023-48302

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

Severity Score

5.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Nextcloud Server proporciona almacenamiento de datos para Nextcloud, una plataforma en la nube de código abierto. A partir de la versión 25.0.0 y anteriores a las versiones 25.0.13, 26.0.8 y 27.1.3 de Nextcloud Server y Nextcloud Enterprise Server, cuando se engaña a un usuario para que copie y pegue código HTML sin marcado (Ctrl+Shift+V), el marcado realmente se representará. Las versiones 25.0.13, 26.0.8 y 27.1.3 de Nextcloud Server y Nextcloud Enterprise Server contienen una solución para este problema. Como workaround, desactive el texto de la aplicación.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-11-14 CVE Reserved
2023-11-21 CVE Published
2024-08-02 CVE Updated
2024-10-21 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://github.com/nextcloud/text/pull/4877	2023-11-30

URL	Date	SRC
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-p7g9-x25m-4h87	2023-11-30

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Nextcloud Search vendor "Nextcloud"		Nextcloud Server Search vendor "Nextcloud" for product "Nextcloud Server"				>= 25.0.0 < 25.0.13 Search vendor "Nextcloud" for product "Nextcloud Server" and version " >= 25.0.0 < 25.0.13"		-		Affected
Nextcloud Search vendor "Nextcloud"		Nextcloud Server Search vendor "Nextcloud" for product "Nextcloud Server"				>= 25.0.0 < 25.0.13 Search vendor "Nextcloud" for product "Nextcloud Server" and version " >= 25.0.0 < 25.0.13"		enterprise		Affected
Nextcloud Search vendor "Nextcloud"		Nextcloud Server Search vendor "Nextcloud" for product "Nextcloud Server"				>= 26.0.0 < 26.0.8 Search vendor "Nextcloud" for product "Nextcloud Server" and version " >= 26.0.0 < 26.0.8"		-		Affected
Nextcloud Search vendor "Nextcloud"		Nextcloud Server Search vendor "Nextcloud" for product "Nextcloud Server"				>= 26.0.0 < 26.0.8 Search vendor "Nextcloud" for product "Nextcloud Server" and version " >= 26.0.0 < 26.0.8"		enterprise		Affected
Nextcloud Search vendor "Nextcloud"		Nextcloud Server Search vendor "Nextcloud" for product "Nextcloud Server"				>= 27.0.0 < 27.1.3 Search vendor "Nextcloud" for product "Nextcloud Server" and version " >= 27.0.0 < 27.1.3"		-		Affected
Nextcloud Search vendor "Nextcloud"		Nextcloud Server Search vendor "Nextcloud" for product "Nextcloud Server"				>= 27.0.0 < 27.1.3 Search vendor "Nextcloud" for product "Nextcloud Server" and version " >= 27.0.0 < 27.1.3"		enterprise		Affected