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1 vulnerability found for backup by FreePBX

CVE-2026-73664 (GCVE-0-2026-73664)
Vulnerability from cvelistv5
Published
2026-08-13 21:30
Modified
2026-08-14 16:16
CWE
  • CWE-269 - Improper Privilege Management
  • CWE-284 - Improper Access Control
  • CWE-732 - Incorrect Permission Assignment for Critical Resource
Summary
FreePBX is an open source IP PBX. From 17.0.5.34 until 17.0.11, the publicKeySave AJAX endpoint in Backup.class.php accepts an authenticated administrator's SSH public key and appends it to /home/asterisk/.ssh/authorized_keys for the asterisk system user without reliably enforcing backup-only command and source restrictions. The key grants persistent shell access that can execute arbitrary commands, access FreePBX and call data, modify system files, and disrupt services. This issue is fixed in version 17.0.11.
Impacted products
Vendor Product Version
FreePBX backup Version: >= 17.0.5.34, < 17.0.11
Create a notification for this product.
Show details on NVD website


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      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-73664",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-14T16:15:54.070979Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-14T16:16:24.751Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "product": "backup",
          "vendor": "FreePBX",
          "versions": [
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              "status": "affected",
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            }
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "FreePBX is an open source IP PBX. From 17.0.5.34 until 17.0.11, the publicKeySave AJAX endpoint in Backup.class.php accepts an authenticated administrator\u0027s SSH public key and appends it to /home/asterisk/.ssh/authorized_keys for the asterisk system user without reliably enforcing backup-only command and source restrictions. The key grants persistent shell access that can execute arbitrary commands, access FreePBX and call data, modify system files, and disrupt services. This issue is fixed in version 17.0.11."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
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            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "privilegesRequired": "HIGH",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
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        {
          "descriptions": [
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              "description": "CWE-284: Improper Access Control",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-732",
              "description": "CWE-732: Incorrect Permission Assignment for Critical Resource",
              "lang": "en",
              "type": "CWE"
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          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-13T21:30:37.573Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/FreePBX/security-reporting/security/advisories/GHSA-24w6-hpg3-rwfg",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/FreePBX/security-reporting/security/advisories/GHSA-24w6-hpg3-rwfg"
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      ],
      "source": {
        "advisory": "GHSA-24w6-hpg3-rwfg",
        "discovery": "UNKNOWN"
      },
      "title": "FreePBX: Authenticated Arbitrary SSH Key Injection via Backup Module"
    }
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    "dateReserved": "2026-08-13T14:04:09.606Z",
    "dateUpdated": "2026-08-14T16:16:24.751Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
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