XSS in Discourse Discourse-Chat
CVE-2022-39279
discourse-chat is a plugin for the Discourse message board which adds chat functionality. In versions prior to 0.9 some places render a chat channel's name and description in an unsafe way, allowing staff members to cause an cross site scripting (XSS) attack by inserting unsafe HTML into them. Version 0.9 has addressed this issue. Users are advised to upgrade. There are no known workarounds for this issue.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (33.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Discourse Discourse-Chat — versions < 0.9
Weakness classification (CWE)
References
- github.com/discourse/discourse-chat/security/advisories/GHSA-qp62-8m3c-9jgj (Third Party Advisory)
- github.com/discourse/discourse-chat/commit/25737733af48e5b9fa60b0561d7fde14bea1… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-39279?
- CVE-2022-39279 is a medium-severity vulnerability in Discourse Discourse-Chat, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2022-10-06.
- How severe is CVE-2022-39279?
- Medium severity. CVSS v3 base score is 4.3 out of 10.