Description
Discourse is an open-source discussion platform. Prior to version 3.1.0.beta3 of the `beta` and `tests-passed` branches, some user provided URLs were being passed to FastImage without SSRF protection. Insufficient protections could enable attackers to trigger outbound network connections from the Discourse server to private IP addresses. This affects any site running the `tests-passed` or `beta` branches versions 3.1.0.beta2 and prior. This issue is patched in version 3.1.0.beta3 of the `beta` and `tests-passed` branches. There are no known workarounds.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_confirm
https://github.com/discourse/discourse/security/advisories/GHSA-9897-x229-55gh
Patch x_refsource_misc
https://github.com/discourse/discourse/pull/20710
Scores
CVSS v3
5.9
EPSS
0.0028
EPSS Percentile
51.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-918
Status
published
Products (2)
discourse/discourse
3.1.0 beta1 (2 CPE variants)
discourse/discourse
< 3.1.0 (2 CPE variants)
Published
Mar 17, 2023
Tracked Since
Feb 18, 2026