Vulnerability-Lookup

GHSA-WXG4-XMXC-6QM6

Vulnerability from github – Published: 2026-09-09 18:32 – Updated: 2026-09-09 18:32

Details

MaxSite CMS through 109.6 contains a local file inclusion vulnerability in the ajax and require-maxsite dispatchers that allows unauthenticated attackers to execute privileged handler files by supplying base64-encoded path traversal sequences. Attackers can bypass path validation checks and execute admin-gated handler actions without authentication to access sensitive functionality.

Severity

8.2 (High)


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

8.8 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-87927"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-98"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-09T17:17:53Z",
    "severity": "HIGH"
  },
  "details": "MaxSite CMS through 109.6 contains a local file inclusion vulnerability in the ajax and require-maxsite dispatchers that allows unauthenticated attackers to execute privileged handler files by supplying base64-encoded path traversal sequences. Attackers can bypass path validation checks and execute admin-gated handler actions without authentication to access sensitive functionality.",
  "id": "GHSA-wxg4-xmxc-6qm6",
  "modified": "2026-09-09T18:32:05Z",
  "published": "2026-09-09T18:32:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-87927"
    },
    {
      "type": "WEB",
      "url": "https://github.com/EviL0rd/maxsite-cve1/blob/main/2026.09.08-maxsite-cms-ajax-lfi-path-traversal.md"
    },
    {
      "type": "WEB",
      "url": "https://github.com/maxsite/cms"
    },
    {
      "type": "WEB",
      "url": "https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/application/views/ajax.php#L17-L42"
    },
    {
      "type": "WEB",
      "url": "https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/application/views/require-maxsite.php#L13-L29"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/maxsite-cms-through-109.6-local-file-inclusion-via-ajax-dispatcher"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-87927 (GCVE-0-2026-87927)

Vulnerability from cvelistv5 – Published: 2026-09-09 16:44 – Updated: 2026-09-09 18:08 X_Open Source Unsupported When Assigned

Title

MaxSite CMS through 109.6 Local File Inclusion via ajax dispatcher

Summary

Severity

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

8.2 (High)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-09 18:08 UTC

CWE

CWE-98 - Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')

Assigner

VulnCheck mitre root

References

5 references

URL	Tags
https://github.com/maxsite/cms	product
https://github.com/EviL0rd/maxsite-cve1/blob/main…	exploittechnical-description
https://github.com/maxsite/cms/blob/2ca0a0c7d1d71…	technical-description
https://github.com/maxsite/cms/blob/2ca0a0c7d1d71…	technical-description
https://www.vulncheck.com/advisories/maxsite-cms-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
MaxSite	MaxSite CMS	Affected: 0.78 , ≤ 109.6 (custom) cpe:2.3:a:max-3000:maxsite_cms::::::::

Date Public

2026-09-09 00:00

Credits

EVIL0RD

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JSON

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        "metrics": [
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                "id": "CVE-2026-87927",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-09T18:08:01.250640Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          "dateUpdated": "2026-09-09T18:08:20.929Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/maxsite/cms",
          "product": "MaxSite CMS",
          "repo": "https://github.com/maxsite/cms",
          "vendor": "MaxSite",
          "versions": [
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              "lessThanOrEqual": "109.6",
              "status": "affected",
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    "dateReserved": "2026-09-09T16:12:19.611Z",
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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.

Action not permitted

GHSA-WXG4-XMXC-6QM6

CVE-2026-87927 (GCVE-0-2026-87927)

Tags

Sightings

Nomenclature