CVE-2024-47773
Anonymous cache poisoning via XHR requests in Discourse
- Published
- Oct 8, 2024
- Updated
- Oct 8, 2024
- Assigning CNA
- GitHub_M
- Evidence observed
- Jul 8, 2025
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:LLow · next 30 days
- Percentile
- 75.2%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Discourse is an open source platform for community discussion. An attacker can make several XHR requests until the cache is poisoned with a response without any preloaded data. This issue only affects anonymous visitors of the site. This problem has been patched in the latest version of Discourse. Users are advised to upgrade. Users unable to upgrade should disable anonymous cache by setting the `DISCOURSE_DISABLE_ANON_CACHE` environment variable to a non-empty value.
Sources
1İbrahimsql · multiple · Jul 8, 2025
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