CVE-2021-43817

Reflected Cross-Site-Scripting vulnerability in Collabora Online

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Collabora Online is a collaborative online office suite based on LibreOffice technology. In affected versions a reflected XSS vulnerability was found in Collabora Online. An attacker could inject unescaped HTML into a variable as they created the Collabora Online iframe, and execute scripts inside the context of the Collabora Online iframe. This would give access to a small set of user settings stored in the browser, as well as the session's authentication token which was also passed in at iframe creation time. Users should upgrade to Collabora Online 6.4.16 or higher or Collabora Online 4.2.20 or higher. Collabora Online Development Edition 21.11 is not affected.

Collabora Online es una suite ofimática colaborativa online basada en la tecnología de LibreOffice. En las versiones afectadas fué encontrada una vulnerabilidad de tipo XSS reflejada en Collabora Online. Un atacante podía inyectar HTML sin esconder en una variable al crear el iframe de Collabora Online, y ejecutar scripts dentro del contexto del iframe de Collabora Online. Esto daría acceso a un pequeño conjunto de configuraciones de usuario almacenadas en el navegador, así como al token de autenticación de la sesión que también era pasado en el momento de la creación del iframe. Los usuarios deben actualizar a Collabora Online versiones 6.4.16 o superior o Collabora Online 4.2.20 o superior. Collabora Online Development Edition versión 21.11 no está afectada

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-11-16 CVE Reserved
2021-12-13 CVE Published
2024-08-04 CVE Updated
2024-08-28 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 (1)

URL	Tag	Source
https://github.com/CollaboraOnline/online/security/advisories/GHSA-7f6h-v9mx-58q9	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Collabora Search vendor "Collabora"		Online Search vendor "Collabora" for product "Online"				< 4.2.20 Search vendor "Collabora" for product "Online" and version " < 4.2.20"		-		Affected
Collabora Search vendor "Collabora"		Online Search vendor "Collabora" for product "Online"				>= 6.4.0 < 6.4.16 Search vendor "Collabora" for product "Online" and version " >= 6.4.0 < 6.4.16"		-		Affected