Description
discourse-bbcode is the official BBCode plugin for Discourse. Prior to commit 91478f5, CSS injection can occur when rendering content generated with the discourse-bccode plugin. This vulnerability only affects sites which have the discourse-bbcode plugin installed and enabled. This issue is patched in commit 91478f5. As a workaround, ensure that the Content Security Policy is enabled and monitor any posts that contain bbcode.
References (2)
Core 2
Core References
Patch, Third Party Advisory
https://github.com/discourse/discourse-bbcode/commit/91478f5cfecdcc43cf85b997168a8ecfd0f8df90
Exploit, Vendor Advisory
https://github.com/discourse/discourse-bbcode/security/advisories/GHSA-8c87-xpqv-c7mp
Scores
CVSS v3
8.8
EPSS
0.0115
EPSS Percentile
78.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-74
CWE-79
Status
published
Products (1)
discourse/discourse_bbcode
< 2022-11-30
Published
Nov 30, 2022
Tracked Since
Feb 18, 2026