{"id":"CVE-2021-21311","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-21311","generatedAt":"2026-10-31T16:14:31.089Z","title":"Adminer Server-Side Request Forgery Vulnerability","description":"Adminer is an open-source database management in a single PHP file. In adminer from version 4.0.0 and before 4.7.9 there is a server-side request forgery vulnerability. Users of Adminer versions bundling all drivers (e.g. `adminer.php`) are affected. This is fixed in version 4.7.9.","published":"2021-02-11T21:15:14.000Z","lastModified":"2026-06-17T03:35:16.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":7.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"},"cwe":["CWE-918"],"affected":["adminer/adminer","debian/debian linux"],"epss":{"score":0.98464,"percentile":0.99919,"date":"2026-10-30","history":[{"date":"2026-09-24","score":0.98464,"percentile":0.99918}]},"kev":{"listed":true,"dateAdded":"2025-09-29","dueDate":"2025-10-20","knownRansomwareCampaignUse":"Unknown","notes":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.\nhttps://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6 ; https://nvd.nist.gov/vuln/detail/CVE-2021-21311"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 20 October 2025). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-09-24T00:00:00.000Z","detail":{"to":0.98464,"from":0.90461,"percentile":0.99918},"summary":"EPSS moved from 90.5% to 98.5% probability of exploitation in the next thirty days."}],"references":[{"url":"https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf","tags":["Exploit","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6","tags":["Patch","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html","tags":["Mailing List","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://packagist.org/packages/vrana/adminer","tags":["Product","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://packagist.org/packages/vrana/adminer","tags":["Product","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21311","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-21311","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."}