{"id":"BIT-discourse-2023-28111","summary":"Discourse vulnerable to SSRF protection bypass possible with IPv4-mapped IPv6 addresses","details":"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.","aliases":["CVE-2023-28111","GHSA-26h3-8ww8-v5fc"],"modified":"2026-09-08T08:46:07.830116401Z","published":"2024-03-06T10:58:28.677Z","database_specific":{"severity":"High","cpes":["cpe:2.3:a:discourse:discourse:*:*:*:*:beta:*:*:*","cpe:2.3:a:discourse:discourse:3.1.0:beta1:*:*:beta:*:*:*","cpe:2.3:a:discourse:discourse:3.1.0:beta2:*:*:beta:*:*:*"]},"references":[{"type":"FIX","url":"https://github.com/discourse/discourse/commit/fd16eade7fcc6bba4b71e71106a2eb13cdfdae4a"},{"type":"FIX","url":"https://github.com/discourse/discourse/pull/20710"},{"type":"ADVISORY","url":"https://github.com/discourse/discourse/security/advisories/GHSA-26h3-8ww8-v5fc"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-28111"}],"affected":[{"package":{"name":"discourse","ecosystem":"Bitnami","purl":"pkg:bitnami/discourse"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.1.0"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/discourse/BIT-discourse-2023-28111.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}],"schema_version":"1.9.0"}