PT-2023-14818 · Discourse · Discourse-Mermaid-Theme-Component+1

0-0Eth0 + 2 · Published 2023-01-04 · Updated 2023-01-10 · CVE-2022-46180

Positive Technologies (AI Summary)

CVSS v3.1

5.0

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions Discourse Mermaid (discourse-mermaid-theme-component) version 1.0.0

Description The issue allows users who can create posts to inject arbitrary HTML on that post, using the Mermaid syntax in Discourse, open-source forum software.

Recommendations For version 1.0.0, update the theme component to version 1.1.0 through the admin UI to resolve the issue. As a temporary workaround, consider disabling the discourse-mermaid-theme-component until the update is applied.

Exploit

Fix

XSS

Special Elements Injection

Weakness Enumeration

CWE-79

CWE-74

Related Identifiers

CVE-2022-46180

GHSA-8437-HGCM-P3Q3

Affected Products

Discourse

Discourse-Mermaid-Theme-Component

References · 7

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/46xxx/CVE-2022-46180.json · Exploit
• https://github.com/discourse/discourse-mermaid-theme-component/pull/14 · Patch
• https://github.com/discourse/discourse-mermaid-theme-component/commit/c10bc4a08bf865cee20e5d5dffba535762813f0f · Patch
• https://osv.dev/vulnerability/CVE-2022-46180 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-46180 · Security Note
• https://github.com/discourse/discourse-mermaid-theme-component/security/advisories/GHSA-8437-hgcm-p3q3 · Note
• https://t.me/cibsecurity/55911 · Telegram Post