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CVE Record

CVE-2017-9442: BigTree CMS through 4.2.18 allows remote authenticated users to execute arbitrary code by uploading a craft...

BigTree CMS through 4.2.18 allows remote authenticated users to execute arbitrary code by uploading a crafted package containing a PHP web shell, related to extraction of a ZIP archive to filename patterns such as cache/package/xxx/yyy.php. This issue exists in core\admin\modules\developer\extensions\install\unpack.php and core\admin\modules\developer\packages\install\unpack.php. NOTE: the vendor states "You must implicitly trust any package or extension you install as they all have the ability to write PHP files.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

BigTree CMS through 4.2.18 could allow an authenticated user to run server-side code by installing a malicious package or extension. This matters most where admin or developer access is broadly shared, delegated to agencies, or used with untrusted add-ons.

Executive priority

Treat this as high priority for any business-critical BigTree site with delegated admin access. If only a small, trusted team can install packages, urgency is lower but governance should still be tightened.

Technical view

The CVE describes arbitrary code execution through ZIP package extraction in BigTree CMS installer code, including developer extension and package unpack handlers. A crafted package can place PHP files under cache/package-style paths. The vendor note frames package and extension installation as a trusted operation.

Likely exposure

Exposure is likely limited to BigTree CMS sites running 4.2.18 or earlier where authenticated users can install packages or extensions. Internet-facing admin panels and third-party maintenance arrangements increase business risk.

Exploitation context

The provided sources do not show active exploitation, KEV listing, CVSS scoring, or a confirmed patch. The reported attack requires authenticated access and package or extension installation capability, not unauthenticated public browsing.

Researcher notes

Evidence is sparse. The CVE identifies affected BigTree versions and installer files, but severity metrics, exploit prevalence, and remediation status are not provided in the bundle. Avoid assuming unauthenticated exploitation or a vendor patch without further source confirmation.

Mitigation direction

  • Limit package and extension installation to fully trusted administrators.
  • Do not install untrusted BigTree packages or extensions.
  • Review vendor guidance before accepting third-party BigTree add-ons.
  • Assess upgrade or migration options for BigTree 4.2.18 or earlier.
  • Monitor package extraction locations for unexpected PHP files.

Validation and detection

  • Inventory all BigTree CMS instances and versions.
  • Identify accounts with package or extension installation privileges.
  • Review recent package and extension installations for untrusted sources.
  • Check web-accessible cache/package paths for unexpected PHP files.
  • Confirm whether vendor guidance addresses this trust-model issue.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
description · low confidence lookup

File access behavior lookup

The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2017-9442 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.