TI-2022-22806 Aliases CVE-2022-46162

Discourse BBCode plugin vulnerable to arbitrary CSS injection

HIGH 76CWE-74Published 2022-11-30 · Updated 2025-04-22

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.01208 68th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed discourse-bbcode (discourse): 91478f5cfecdcc43cf85b997168a8ecfd0f8df90

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
discourse	discourse-bbcode	before 91478f5cfecdcc43cf85b997168a8ecfd0f8df90	91478f5cfecdcc43cf85b997168a8ecfd0f8df90	Patch available	CNA

discourse-bbcode Vendordiscourse Affected before 91478f5cfecdcc43cf85b997168a8ecfd0f8df90 Fixed in 91478f5cfecdcc43cf85b997168a8ecfd0f8df90 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:discourse:discourse_bbcode::::::discourse::*	before 2022-11-30	Vulnerable	discourse

cpe:2.3:a:discourse:discourse_bbcode:*:*:*:*:*:discourse:*:* Versions before 2022-11-30 Vulnerable ·discourse

Remediation

Fix · CNA discourse-bbcode (discourse) Fixed in 91478f5cfecdcc43cf85b997168a8ecfd0f8df90

Timeline

2026-10-02 Threatist record created from CVE-2022-46162

References

Exploit 1

https://github.com/discourse/discourse-bbcode/security/advisories/GHSA-8c87-xpqv-c7mp

Patch 1

https://github.com/discourse/discourse-bbcode/commit/91478f5cfecdcc43cf85b997168a8ecfd0f8df90

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences