{"id":"CVE-2021-41163","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-41163","generatedAt":"2026-11-05T01:03:21.094Z","title":"In affected versions maliciously crafted requests could lead to remote code execution.","description":"Discourse is an open source platform for community discussion. In affected versions maliciously crafted requests could lead to remote code execution. This resulted from a lack of validation in subscribe_url values. This issue is patched in the latest stable, beta and tests-passed versions of Discourse. To workaround the issue without updating, requests with a path starting /webhooks/aws path could be blocked at an upstream proxy.","published":"2021-10-20T23:15:07.000Z","lastModified":"2026-06-17T04:08:00.000Z","status":"Modified","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-74"],"affected":["discourse/discourse"],"epss":{"score":0.19812,"percentile":0.97416,"date":"2026-11-03","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 19.8%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://github.com/discourse/discourse/commit/fa3c46cf079d28b086fe1025349bb00223a5d5e9","tags":["Patch","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/discourse/discourse/security/advisories/GHSA-jcjx-pvpc-qgwq","tags":["Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/discourse/discourse/commit/fa3c46cf079d28b086fe1025349bb00223a5d5e9","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/discourse/discourse/security/advisories/GHSA-jcjx-pvpc-qgwq","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-41163","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}