yora1928/CVE-2026-48908-by-yora

GitHubRepository PoCExploit

PoC files

6 files

File viewing is interactive and short-lived. Downloads are password-protected ZIP archives using password eip.

GitHub
Analysisdeepseek-v4-pro:cloud ·

Technical assessment

The artifact is a Python-based tool that detects vulnerable Joomla SP Page Builder instances (CVE-2026-48908) and, when the --exploit flag is used, actively uploads a PHP webshell to achieve remote code execution. The scanner.py file contains a complete Exploiter class that builds a ZIP archive with a PHP payload, uploads it to the vulnerable endpoint, and executes commands on the target.

Backdoor review

No backdoor observed in reviewed code

The repository contains a scanner and PoC for CVE-2026-48908. The Python code (scanner.py) performs detection, version fingerprinting, and an optional adaptive exploit that uploads a PHP webshell to confirm RCE. The webshell is token-protected and executes only the command supplied via the 'c' parameter. No concealed backdoor, credential theft, persistence mechanism, or unrelated payload was observed. The tool's behavior is consistent with its stated purpose of vulnerability validation.

ClassificationExploit
Model confidence95%
AuthenticationNot required
LanguagesPython
Target softwareJoomlaSP Page Builder
Attack typesRemote Code ExecutionUnrestricted File Upload
Evidence & reasoningClassification basis · observed behavior · safety review
Technical evidence

Classification basis and observed behavior

Classification basis

The scanner.py file contains a complete Exploiter class that actively uploads a PHP payload and executes commands on the target, which is the definition of an exploit. The README.md describes the tool as a 'Scanner + PoC (Safe Exploit)' and provides instructions for using the --exploit flag to achieve RCE.

scanner.py:319-428README.md:2README.md:97-101

Requirements

  • Target must be running a vulnerable version of SP Page Builder (<=6.6.1) with the uploadCustomIcon endpoint accessible without authentication.scanner.py:37scanner.py:44

Observed behavior

  • The tool fingerprints the target to detect Joomla and SP Page Builder, then validates the vulnerable endpoint. If the --exploit flag is set and the target is classified as CONFIRMED, it attempts to upload a ZIP file containing a PHP webshell via the asset.uploadCustomIcon endpoint. It then accesses the uploaded shell to execute a test command (echo SPPB-RCE-$((7*6))) and confirms RCE if the output contains 'SPPB-RCE-42'.scanner.py:319-428scanner.py:455-473
  • The exploit attempts multiple PHP file extensions and a .htaccess trick to bypass upload filters.scanner.py:383-390
  • The uploaded PHP shell is token-protected and executes arbitrary system commands passed via the 'c' GET parameter.scanner.py:325-326
Safety-review evidence

Behaviors behind the backdoor verdict

Observables

Webshell Upload
scanner.py lines 325-326: PHP shell with token check and system() callThe exploit uploads a PHP file that executes arbitrary commands, but this is the expected PoC behavior for demonstrating RCE. The shell is token-protected and only runs commands passed via the 'c' parameter.scanner.py:325-326
Command Execution
scanner.py line 408: test command 'echo SPPB-RCE-$((7*6))'The exploit verifies RCE by executing a harmless arithmetic command. This is a standard PoC technique and does not indicate malicious intent.scanner.py:408
Cleanup Instructions
scanner.py lines 430-439: cleanup prints 'rm -rf' commands for manual removalThe tool provides manual cleanup instructions rather than automatically deleting files, which is a responsible disclosure practice.scanner.py:430-439
Review boundaries

What the analysis did not establish

  • The evidence packet reports complete_artifact_coverage as false, indicating that not all files from the repository were included. Three text files (README.md, requirements.txt, scanner.py) are provided, but three additional files are omitted. The omitted files are described as 'detection/', 'poc/', and 'reports/' directories in the README, but their contents are unknown and could contain additional exploit or scanner code.
  • Three files (SECURITY.md, LICENSE, and directories detection/, poc/, reports/) were not included in the text evidence; their content is unknown. However, the primary executable logic is in scanner.py, which was fully reviewed.
  • Binary content was not analyzed, but no binary files were identified in the artifact.
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.

Linked vulnerabilities

1