Home/CVE/Discourse is an open source platform for community discussion. In versions 3.1.0 through 3.1.2 of the `stable` branch an
CVE

CVE-2023-47120

Discourse is an open source platform for community discussion. In versions 3.1.0 through 3.1.2 of the `stable` branch an

Discourse is an open source platform for community discussion. In versions 3.1.0 through 3.1.2 of the stable branch and versions 3.1.0,beta6 through 3.2.0.beta2 of the beta and tests-passed branches, Redis memory can be depleted by crafting a site with an abnormally long favicon URL and drafting multiple posts which Onebox it. 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.

HIGH · CVSS 7.5 EPSS 0.003
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-770Allocation of Resources Without Limits or Throttling
▤

Affected Products & Versions

2
discourse>= 3.1.0 and < 3.1.3
discourseall versions
▣

Scoring & Timeline

7.5
HIGH · 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 · 04:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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/95a82d608d6377faf68a0e2c5d9640b043557852Patch
https://github.com/discourse/discourse/commit/e910dd09140cb4abc3a563b95af4a137ca7fa0cePatch
https://github.com/discourse/discourse/security/advisories/GHSA-77cw-xhj8-hfp3Vendor Advisory
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