Froxlor before 2.3.12 Privilege Escalation via Symlink

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-100716",
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "dateUpdated": "2026-09-26T13:24:07.854Z",
    "dateReserved": "2026-09-26T02:40:56.225Z",
    "datePublished": "2026-09-26T13:24:07.854Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck",
        "dateUpdated": "2026-09-26T13:24:07.854Z"
      },
      "datePublic": "2026-09-06T00:00:00.000Z",
      "title": "Froxlor before 2.3.12 Privilege Escalation via Symlink",
      "descriptions": [
        {
          "lang": "en",
          "value": "Froxlor is a server administration panel. In versions 2.3.10 and earlier, the customer data-export (DataDump) cron fails to validate intermediate path components of the export destination: Froxlor\\FileDir::makeCorrectDir() contains an off-by-one in its path-component walk that skips the first segment below the customer home directory, and the guard in ExportCron.php checks only the final component with is_link(). An authenticated customer whose account has the export feature enabled can schedule an export into a genuine subdirectory of their own webspace, then replace an intermediate path component with a symlink before the root-owned cron runs. The cron's `chown -R` then recursively changes ownership of the linked directory tree — for example /etc — to the customer's UID, yielding host root and cross-tenant compromise. Exploitation is deterministic and requires no race. This is an incomplete fix of GHSA-75h4-... The issue is fixed in Froxlor 2.3.12."
        }
      ],
      "affected": [
        {
          "vendor": "froxlor",
          "product": "froxlor",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "2.3.12"
            },
            {
              "version": "2.3.12",
              "status": "unaffected",
              "versionType": "semver"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "Improper Link Resolution Before File Access ('Link Following')",
              "cweId": "CWE-59",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/froxlor/froxlor/security/advisories/GHSA-2wjc-6mgx-hq42",
          "name": "GitHub Security Advisory (GHSA-2wjc-6mgx-hq42)",
          "tags": [
            "vendor-advisory"
          ]
        },
        {
          "url": "https://www.vulncheck.com/advisories/froxlor-before-2.3.12-privilege-escalation-via-symlink",
          "name": "VulnCheck Advisory: Froxlor before 2.3.12 Privilege Escalation via Symlink",
          "tags": [
            "third-party-advisory"
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS"
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "LOW",
            "userInteraction": "NONE",
            "scope": "CHANGED",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "availabilityImpact": "HIGH",
            "baseScore": 9.9,
            "baseSeverity": "CRITICAL"
          }
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "skeletonsec",
          "type": "reporter"
        }
      ]
    }
  }
}