{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-58394","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-30T18:19:58.378Z","datePublished":"2026-10-15T15:20:15.232Z","dateUpdated":"2026-10-15T18:36:57.734Z"},"containers":{"cna":{"title":"OPNsense: Stored XSS in Administration Settings via Certificate Description","problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.2,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/opnsense/core/security/advisories/GHSA-8pgr-x852-qx4j","tags":["x_refsource_CONFIRM"],"url":"https://github.com/opnsense/core/security/advisories/GHSA-8pgr-x852-qx4j"},{"name":"https://github.com/opnsense/core/commit/9d0a590e9c49f4374a5539929b366123f63bc9eb","tags":["x_refsource_MISC"],"url":"https://github.com/opnsense/core/commit/9d0a590e9c49f4374a5539929b366123f63bc9eb"},{"name":"https://github.com/opnsense/core/commit/adcb02f8f68071e636bf9660b2cb8d0229f34674","tags":["x_refsource_MISC"],"url":"https://github.com/opnsense/core/commit/adcb02f8f68071e636bf9660b2cb8d0229f34674"},{"name":"https://hackerask.com/posts/opnsense","tags":["x_refsource_MISC"],"url":"https://hackerask.com/posts/opnsense"}],"affected":[{"vendor":"opnsense","product":"core","versions":[{"version":"< 26.1.11","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-10-15T15:20:15.232Z"},"descriptions":[{"lang":"en","value":"OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, src/www/system_advanced_admin.php reads certificate records into $a_cert but omits that array from legacy_html_escape_form_data() before rendering each certificate descr value in the SSL Certificate selector. The certificate description accepts HTML metacharacters, allowing a user with the page-system-certmanager privilege to store markup that executes when another user opens System Settings Administration. This issue is fixed in version 26.1.11."}],"source":{"advisory":"GHSA-8pgr-x852-qx4j","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/opnsense/core/security/advisories/GHSA-8pgr-x852-qx4j","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-15T18:35:21.476267Z","id":"CVE-2026-58394","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-15T18:36:57.734Z"}}]}}