Description
Discourse is an open-source discussion platform. Prior to version 3.1.0.beta3 of the `beta` and `tests-passed` branches, attackers are able to bypass Discourse's server-side request forgery (SSRF) protection for private IPv4 addresses by using a IPv4-mapped IPv6 address. The issue is patched in the latest beta and tests-passed version of Discourse. 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-26h3-8ww8-v5fc
Patch x_refsource_misc
https://github.com/discourse/discourse/pull/20710
Scores
CVSS v3
5.7
EPSS
0.0025
EPSS Percentile
48.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/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
Published
Mar 17, 2023
Tracked Since
Feb 18, 2026