CVE-2021-37633

XSS via d-popover and d-html-popover attribute

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Discourse is an open source discussion platform. In versions prior to 2.7.8 rendering of d-popover tooltips can be susceptible to XSS attacks. This vulnerability only affects sites which have modified or disabled Discourse's default Content Security Policy. This issue is patched in the latest `stable` 2.7.8 version of Discourse. As a workaround users may ensure that the Content Security Policy is enabled, and has not been modified in a way which would make it more vulnerable to XSS attacks.

Discourse es una plataforma de discusión de código abierto. En versiones anteriores a 2.7.8, la representación de los tooltips de d-popover puede ser susceptible de ataques de tipo XSS. Esta vulnerabilidad sólo afecta a los sitios que han modificado o desactivado la política de seguridad de contenidos predeterminada de Discourse. Este problema está parcheado en la última versión "stable" 2.7.8 de Discourse. Como solución, los usuarios pueden asegurarse de que la política de seguridad de contenidos está activada y no ha sido modificada de forma que sea más vulnerable a ataques de tipo XSS

*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

High

Integrity

None

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

2021-07-29 CVE Reserved
2021-08-09 CVE Published
2024-04-24 EPSS Updated
2024-08-04 CVE 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
https://github.com/discourse/discourse/security/advisories/GHSA-v3v8-3m5w-pjp9	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://github.com/discourse/discourse/commit/38199424bc840d2ef002cd1e9bffdbb99191eb47	2021-08-17

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				< 2.7.8 Search vendor "Discourse" for product "Discourse" and version " < 2.7.8"		-		Affected
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				2.8.0 Search vendor "Discourse" for product "Discourse" and version "2.8.0"		beta2		Affected
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				2.8.0 Search vendor "Discourse" for product "Discourse" and version "2.8.0"		beta3		Affected