CVE-2021-29438

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in @nextcloud/dialogs

Severity Score

5.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The Nextcloud dialogs library (npm package @nextcloud/dialogs) before 3.1.2 insufficiently escaped text input passed to a toast. If your application displays toasts with user-supplied input, this could lead to a XSS vulnerability. The vulnerability has been patched in version 3.1.2 If you need to display HTML in the toast, explicitly pass the `options.isHTML` config flag.

La biblioteca de diálogos de Nextcloud (paquete npm @nextcloud/dialogs) versiones anteriores a 3.1.2, la entrada de texto con un escape insuficiente se pasó a un toast. Si su aplicación muestra toast con información suministrada por un usuario, esto podría conllevar a una vulnerabilidad de tipo XSS. La vulnerabilidad ha sido parcheada en la versión 3.1.2. Si necesita mostrar HTML en el toast pase explícitamente el flag de configuración "options.isHTML"

*Credits: N/A

CVSS Scores

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

Low

Integrity

Low

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

2021-03-30 CVE Reserved
2021-04-13 CVE Published
2023-11-08 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

CAPEC

References (2)

URL	Tag	Source
https://github.com/nextcloud/nextcloud-dialogs/security/advisories/GHSA-g3fq-3v3g-mh32	Third Party Advisory
https://www.npmjs.com/package/%40nextcloud/dialogs	X_refsource_misc

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
Nextcloud\/dialogs Project Search vendor "Nextcloud\/dialogs Project"		Nextcloud\/dialogs Search vendor "Nextcloud\/dialogs Project" for product "Nextcloud\/dialogs"				< 3.1.2 Search vendor "Nextcloud\/dialogs Project" for product "Nextcloud\/dialogs" and version " < 3.1.2"		node.js		Affected