papageo75

GitHub · Repository owner · Source ID 134793474
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Source-scoped identity with 1 associated PoC and 1 linked vulnerability.

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papageo75/CVE-2026-48908-PoC

Repository PoC15Created 2026-06-22ExploitCVE-2026-489085 files

18.9 KiB

GitHubPoC details
Analysisdeepseek-v4-pro:cloud ·

Technical assessment

A Python script (sppb_rce.py) that exploits CVE-2026-48908, an unauthenticated arbitrary file upload vulnerability in the SP Page Builder Joomla component, to achieve remote code execution. It uploads a crafted ZIP archive containing a PHP web shell to a publicly accessible directory and then executes commands via HTTP requests.

Backdoor review

No backdoor observed in reviewed code

The PoC is a straightforward exploit for CVE-2026-48908. It uploads a ZIP containing a token-guarded PHP webshell to a vulnerable Joomla component. The shell only executes commands when the correct token is supplied, and the script includes a cleanup function. No concealed backdoor, unrelated payload, or deceptive behavior was observed.

ClassificationExploit
Model confidence100%
AuthenticationNot required
Languagespython
Target softwareSP Page Builder for Joomla
Attack typesremote_code_executionarbitrary_file_upload
Evidence & reasoningClassification basis · observed behavior · safety review
Technical evidence

Classification basis and observed behavior

Classification basis

The artifact is a fully functional Python script that actively exploits CVE-2026-48908 by uploading a malicious ZIP file containing a PHP web shell and then executing arbitrary commands on the target server. It is not merely a scanner or writeup; it performs the exploitation steps to achieve remote code execution.

sppb_rce.py:1-223README.md:1-5

Requirements

  • Target must run a vulnerable version of SP Page Builder (<= 6.6.1) with the uploadCustomIcon task accessible without authentication.sppb_rce.py:8-12
  • The web server must allow PHP execution in the upload directory, or AllowOverride must be enabled for the .htaccess bypass method.README.md:45-49

Observed behavior

  • Sends an unauthenticated POST request to index.php?option=com_sppagebuilder&task=asset.uploadCustomIcon with a crafted ZIP file containing a PHP web shell.sppb_rce.py:85-102
  • Iterates through a list of PHP file extensions and a .htaccess bypass method, uploading a shell and checking for code execution by requesting the shell with a token and a test command.sppb_rce.py:115-140
  • If code execution is confirmed, runs a user-specified command or provides an interactive pseudo-shell by sending HTTP requests to the uploaded web shell.sppb_rce.py:189-207
Safety-review evidence

Behaviors behind the backdoor verdict

Observables

Token Guarded Webshell
Payload withheldThe uploaded PHP shell is guarded by a random per-run token, preventing unauthorized access.sppb_rce.py:65-66
Cleanup Function
Payload withheldThe script provides a --cleanup option to remove the payload directories it created.sppb_rce.py:209-216
Disclaimer
Payload withheldThe README and script header contain disclaimers stating the tool is for authorized testing only.README.md:160-177sppb_rce.py:28-29
Review boundaries

What the analysis did not establish

  • Two files (LICENSE and .gitignore) are omitted from the text evidence, but they are not required for technical analysis of the exploit code.
  • The evidence does not include the actual execution of the exploit; classification is based solely on static analysis of the provided source code.
  • Two files (LICENSE and an unspecified file) were omitted from the text content and not reviewed, but their metadata shows no executable or suspicious characteristics.
  • The review is based solely on the supplied text evidence; no dynamic analysis was performed.
Model interpretation

This review is limited to the supplied PoC code and context. It does not assert that the code works or is safe to execute.