CVE-2026-48909

CRITICAL

Joomla Extension - joomshaper.com - PHP Object injection in SP LMS extension for Joomla < 4.1.4

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-48909. PoCs published by Is4yev.

AI-analyzed exploit summary This repository contains a functional exploit for CVE-2026-48909, targeting a PHP object injection vulnerability in JoomShaper SP LMS (com_splms) that leads to remote code execution (RCE). The exploit leverages a gadget chain involving FormattedtextLogger to write a webshell to disk, bypassing Joomla's input filter by carefully crafting the payload.

Description

SP LMS (com_splms) < 4.1.4 by JoomShaper deserializes user-controlled cookie data without validation, enabling an unauthenticated remote attacker to execute arbitrary code on the server.

Exploits (1)

github WORKING POC
by Is4yev · pythonpoc
https://github.com/Is4yev/CVE-2026-48909

This repository contains a functional exploit for CVE-2026-48909, targeting a PHP object injection vulnerability in JoomShaper SP LMS (com_splms) that leads to remote code execution (RCE). The exploit leverages a gadget chain involving FormattedtextLogger to write a webshell to disk, bypassing Joomla's input filter by carefully crafting the payload.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Complex
Reliability
Reliable
Target: JoomShaper SP LMS <= 4.1.3 (with Joomla < 5.2.2)
No auth needed
Prerequisites: Joomla < 5.2.2 · SP LMS <= 4.1.3 · PHP-writable path on the server
mistral-large-3 · analyzed Jun 22, 2026 Full analysis →

References (1)

Core 1
Core References
Product product
https://www.joomshaper.com/

Scores

CVSS v4 9.5
EPSS 0.0080
EPSS Percentile 52.0%
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-502
Status published
Products (1)
joomshaper.net/SP LMS extension for Joomla 1.0.0-4.1.3
Published Jun 20, 2026
Tracked Since Jun 20, 2026