CVE-2024-47773 json
Anonymous cache poisoning via XHR requests in Discourse
published 2024-10-08 2 y ago modified 2026-09-08 2 mo ago also BIT-discourse-2024-47773 , EUVD-2024-42683 , GHSA-58vv-9j8h-hw2v
- cvss
- 8.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.8%
- EPSS 1.8% chance of exploitation in 30 days, percentile 78%
- public exploits
- 1
- Exploit-DB
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.
Patch / fix
- bitnami discourse 3.3.2
- discourse discourse 3.3.2
Timeline
- Published
- First public exploit (EDB-52358)
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
1.80% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-52358 Discourse 3.2.x - Anonymous Cache Poisoning webapps, 2025-07-08
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L |
| OSV | 3.1 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | discourse | <3.3.2 |
3.3.2 |
Affected products
- discourse discourse
Classification
- Weakness
-
- CWE-610 Externally Controlled Reference to a Resource in Another Sphere
References
-
github.com
/discourse/discourse/security/advisories/GHSA-58vv-9j8h-hw2v
third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2024-47773
web
Sources
- CVE List CVE-2024-47773
- NVD CVE-2024-47773
- OSV BIT-discourse-2024-47773
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.