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-2023-45806

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, if a user has been quoted and uses a | in their full name, they might be able to trigger a bug that generates a lot of duplicate content in all the posts they've been quoted by updating their full name again. Version 3.1.3 of the stable branch and version 3.2.0.beta3 of the beta and tests-passed branches contain a patch for this issue.

No known workaround exists, although one can stop the "bleeding" by ensuring users only use alphanumeric characters in their full name field.

MEDIUM · CVSS 4.3 EPSS 0.0395
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-1333Inefficient Regular Expression Complexity
▤

Affected Products & Versions

3
discourse< 3.1.3
discourse< 3.2.0
discourseall versions
▣

Scoring & Timeline

4.3
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:L/UI:N/S:U/C:N/I:N/A:L
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
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/2ec25105179199cf80912bf011c18b8b870e1863Patch
https://github.com/discourse/discourse/commit/7d484864fe91ff79c478f57e7ddb1235d701921ePatch
https://github.com/discourse/discourse/security/advisories/GHSA-hcgf-hg2g-mw78PatchVendor Advisory
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