{"id":"CVE-2026-58655","state":"PUBLISHED","title":"Grav Flex Objects - Server-Side Template Injection via Dynamic Titles","description":"The bundled Grav Flex Objects plugin (getgrav/grav-plugin-flex-objects) before 1.4.0 contains a stored server-side template injection vulnerability. When rendering dynamic collection or object titles, the plugin passes user-controlled frontmatter values (page.header.flex.collection.title or page.header.flex.object.title) to Twig's template_from_string(), causing them to be evaluated as Twig code rather than treated as text. This path bypasses Grav's Security::cleanDangerousTwig() sanitization. An attacker who can control the title frontmatter of a publicly reachable Flex Objects page can achieve arbitrary Twig execution and escalate to remote command execution via access to internal Grav services such as the scheduler.","publishedAt":"2026-07-15T11:25:34.186Z","updatedAt":"2026-07-28T13:02:09.024Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["getgrav grav"],"affected":[{"vendor":"getgrav","product":"grav","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.4.0","versionType":"semver"},{"version":"1.4.0","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/getgrav/grav/security/advisories/GHSA-623v-m3c4-3pw8","https://www.vulncheck.com/advisories/grav-flex-objects-server-side-template-injection-via-dynamic-titles"],"weaknesses":["CWE-94"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/58xxx/CVE-2026-58655.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-58655","state":"PUBLISHED","datePublished":"2026-07-15T11:25:34.186Z","dateUpdated":"2026-07-28T13:02:09.024Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-07-01T21:54:37.946Z"},"containers":{"cna":{"title":"Grav Flex Objects - Server-Side Template Injection via Dynamic Titles","descriptions":[{"lang":"en","value":"The bundled Grav Flex Objects plugin (getgrav/grav-plugin-flex-objects) before 1.4.0 contains a stored server-side template injection vulnerability. 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An attacker who can control the title frontmatter of a publicly reachable Flex Objects page can achieve arbitrary Twig execution and escalate to remote command execution via access to internal Grav services such as the scheduler."}],"affected":[{"vendor":"getgrav","product":"grav","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.4.0","versionType":"semver"},{"version":"1.4.0","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/getgrav/grav/security/advisories/GHSA-623v-m3c4-3pw8","name":"GitHub Security Advisory (GHSA-623v-m3c4-3pw8)","tags":["vendor-advisory"]},{"url":"https://www.vulncheck.com/advisories/grav-flex-objects-server-side-template-injection-via-dynamic-titles","name":"VulnCheck Advisory: Grav Flex Objects - Server-Side Template Injection via Dynamic Titles","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-94","lang":"en","description":"Improper Control of Generation of Code ('Code Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-07-28T13:02:09.024Z"},"datePublic":"2026-06-22T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:*","versionEndExcluding":"1.4.0"}]}]}],"credits":[{"lang":"en","value":"n00o00b","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/getgrav/grav/security/advisories/GHSA-623v-m3c4-3pw8","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-15T12:18:16.613803Z","id":"CVE-2026-58655","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-15T12:18:22.914Z"}}]}}}