CVE-2021-37633

HIGH

Discourse < 2.7.8 - Cross-Site Scripting via d-popover Tooltip Rendering

Title source: llm
STIX 2.1

Description

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.

References (2)

Core 2

Scores

CVSS v3 7.4
EPSS 0.0034
EPSS Percentile 57.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

Details

CWE
CWE-79
Status published
Products (2)
discourse/discourse 2.8.0 beta2 (2 CPE variants)
discourse/discourse < 2.7.8
Published Aug 09, 2021
Tracked Since Feb 18, 2026