ayiezola Exploits and Proofs of Concept

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GitHub

ayiezola/CVE-2026-48908

Repository PoC0Created 2026-06-28ExploitCVE-2026-489086 files

214.8 KiB

Analysisdeepseek-v4-pro:cloud · 2026-08-07

Technical assessment

A Python script that exploits CVE-2026-48908 in SP Page Builder for Joomla by uploading a crafted ZIP file containing a PHP webshell via an unauthenticated endpoint, then executing arbitrary commands on the target.

Backdoor review

No backdoor observed in reviewed code

The PoC is a straightforward exploit for CVE-2026-48908. It uploads a token-guarded PHP webshell or a user-supplied custom shell to a vulnerable Joomla component. The code performs only the advertised exploit behavior: crafting a ZIP payload, uploading it unauthenticated, and executing commands via the uploaded shell. No concealed backdoor, credential theft, persistence mechanism, or unrelated payload was observed.

ClassificationExploit

Model confidence100%

AuthenticationNot required

LanguagesPython

Target softwareSP Page Builder (com_sppagebuilder) for Joomla

Attack typesRemote Code ExecutionUnrestricted File Upload

Evidence & reasoningClassification basis · observed behavior · safety review

Technical evidence

Classification basis and observed behavior

Classification basis

The script actively uploads a PHP webshell and executes attacker-supplied commands on the target, which is the definition of an exploit. It does not merely detect the vulnerability; it exercises it to achieve remote code execution.

exploit_poc.py:34-40exploit_poc.py:59-63exploit_poc.py:86-88exploit_poc.py:120-123

Requirements

Target running SP Page Builder ≤ 6.6.1 with the vulnerable asset.uploadCustomIcon task exposed.README.md:3exploit_poc.py:18
Python 3.8+ with requests and payload withheld libraries installed.README.md:25requirements.txt:1-2

Observed behavior

Sends an unauthenticated POST request to the asset.uploadCustomIcon task with a ZIP file containing a PHP webshell.exploit_poc.py:59-83
Extracts the uploaded webshell path from the JSON response and executes an arbitrary system command via HTTP GET request.exploit_poc.py:86-88exploit_poc.py:120-123
Supports mass scanning of multiple hosts with multi-threading and saves results to categorized output files.exploit_poc.py:272-381

Safety-review evidence

Behaviors behind the backdoor verdict

Observables

Built-In Webshell: Payload withheldThe default payload is a token-guarded PHP webshell that executes commands passed via the 'c' parameter. This is the expected exploit payload for the CVE.exploit_poc.py:39-40
Custom Shell Upload: Payload withheldThe script supports uploading an arbitrary PHP file as a custom webshell. This is a documented feature for authorized testing and does not introduce hidden behavior.exploit_poc.py:210-223
External Dependency: Payload withheldThe script imports 'payload withheld' (line 9), which is not a standard library and is listed in requirements.txt. Its purpose is unclear from the provided text, but it is used only for console output functions (info, success, warning, error) and does not introduce backdoor behavior.exploit_poc.py:9requirements.txt:2

Review boundaries

What the analysis did not establish

Evidence includes only the README, exploit script, and requirements file; 3 non-text media files (screenshots) are omitted.
The script imports 'payload withheld' which is not a standard library and may be a typo or custom module; its absence could affect execution but does not change the exploit classification.
The 'payload withheld' library imported from line 9 of exploit_poc.py is not included in the evidence; its source code was not reviewed.
Three non-text files (images) totaling 197,299 bytes were omitted from the evidence and not analyzed.
The evidence does not include the original PoC by papageo75 for comparison of modifications.

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.

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