Vulnerability Details : CVE-2023-29196
Discourse is an open source platform for community discussion. This vulnerability is not exploitable on the default install of Discourse. A custom feature must be enabled for it to work at all, and the attacker’s payload must pass the CSP to be executed. However, if an attacker succeeds in embedding Javascript that does pass the CSP, it could result in session hijacking for any users that view the attacker’s post. The vulnerability is patched in the latest tests-passed, beta and stable branches. Users are advised to upgrade. Users unable to upgrade should enable and/or restore your site's CSP to the default one provided with Discourse. Remove any embed-able hosts configured.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2023-29196
- cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*
- cpe:2.3:a:discourse:discourse:*:*:*:*:beta:*:*:*
- cpe:2.3:a:discourse:discourse:3.1.0:beta1:*:*:beta:*:*:*
- cpe:2.3:a:discourse:discourse:3.1.0:beta2:*:*:beta:*:*:*
- cpe:2.3:a:discourse:discourse:3.1.0:beta3:*:*:beta:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-29196
0.12%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 31 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-29196
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
6.1
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
2.8
|
2.7
|
NIST | |
4.2
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N |
1.6
|
2.5
|
GitHub, Inc. |
CWE ids for CVE-2023-29196
-
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.Assigned by: security-advisories@github.com (Primary)
References for CVE-2023-29196
-
https://github.com/discourse/discourse/security/advisories/GHSA-986p-4x8q-8f48
HTML injection via topic embedding · Advisory · discourse/discourse · GitHubThird Party Advisory
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