{"id":"CVE-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":["BIT-discourse-2023-28111","GHSA-26h3-8ww8-v5fc"],"modified":"2026-09-29T11:46:03.048627313Z","published":"2023-03-17T17:00:04.375Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28111.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28111.json"},{"type":"ADVISORY","url":"https://github.com/discourse/discourse/security/advisories/GHSA-26h3-8ww8-v5fc"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-28111"},{"type":"FIX","url":"https://github.com/discourse/discourse/commit/fd16eade7fcc6bba4b71e71106a2eb13cdfdae4a"},{"type":"FIX","url":"https://github.com/discourse/discourse/pull/20710"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/discourse/discourse","events":[{"introduced":"6b5743ba3cc06da4f8978299c31360a297bfc41d"},{"fixed":"fd16eade7fcc6bba4b71e71106a2eb13cdfdae4a"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"beta \u003c 3.1.0.beta3"},{"last_affected":"beta \u003c 3.1.0.beta3"},{"introduced":"tests-passed \u003c 3.1.0.beta3"},{"last_affected":"tests-passed \u003c 3.1.0.beta3"}]}}],"versions":["beta \u003c 3.1.0.beta3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-28111.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N"}]}