Home/CVE/Discourse is an open source platform for community discussion. Prior to version 3.1.3 of the `stable` branch and version
CVE

CVE-2023-47119

Discourse is an open source platform for community discussion. Prior to version 3.1.3 of the `stable` branch and version

Discourse is an open source platform for community discussion. Prior to version 3.1.3 of the stable branch and version 3.2.0.beta3 of the beta and tests-passed branches, some links can inject arbitrary HTML tags when rendered through our Onebox engine. The issue is patched in version 3.1.3 of the stable branch and version 3.2.0.beta3 of the beta and tests-passed branches.

There are no known workarounds.

MEDIUM · CVSS 5.3 EPSS 0.14239
Schedule remediation
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 5% of all CVEs by exploitation likelihood
  • SSVC automatable: yes - attacks can be scripted at scale
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
▤

Affected Products & Versions

3
discourse< 3.1.3
discourse< 3.2.0
discourseall versions
▣

Scoring & Timeline

5.3
MEDIUM · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD10 Nov 2023 · 03:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/discourse/discourse/commit/628b293ff53fb617b3464dd27268aec84388cc09Patch
https://github.com/discourse/discourse/commit/d78357917c6a917a8a27af68756228e89c69321cPatch
https://github.com/discourse/discourse/security/advisories/GHSA-j95w-5hvx-jp5wVendor Advisory
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