CVE-2026-48909: CWE-502 Deserialization of Untrusted Data in joomshaper.net SP LMS extension for Joomla
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.
AI Analysis
Technical Summary
The SP LMS extension for Joomla (com_splms) versions 1.0.0 up to 4.1.3 deserializes user-controlled cookie data without proper validation. This unsafe deserialization can be exploited by unauthenticated remote attackers to execute arbitrary code on the server, leading to full compromise. The vulnerability is tracked as CVE-2026-48909 and is classified under CWE-502 (Deserialization of Untrusted Data). The CVSS 4.0 base score is 9.5, indicating a critical severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows unauthenticated remote attackers to execute arbitrary code on the affected server, potentially leading to full system compromise, data theft, or service disruption.
Mitigation Recommendations
No official patch or remediation level is currently confirmed. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the vulnerable extension and monitor for suspicious activity related to cookie handling.
CVE-2026-48909: CWE-502 Deserialization of Untrusted Data in joomshaper.net SP LMS extension for Joomla
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.
CVSS v4.0
Score 9.5critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The SP LMS extension for Joomla (com_splms) versions 1.0.0 up to 4.1.3 deserializes user-controlled cookie data without proper validation. This unsafe deserialization can be exploited by unauthenticated remote attackers to execute arbitrary code on the server, leading to full compromise. The vulnerability is tracked as CVE-2026-48909 and is classified under CWE-502 (Deserialization of Untrusted Data). The CVSS 4.0 base score is 9.5, indicating a critical severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows unauthenticated remote attackers to execute arbitrary code on the affected server, potentially leading to full system compromise, data theft, or service disruption.
Mitigation Recommendations
No official patch or remediation level is currently confirmed. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the vulnerable extension and monitor for suspicious activity related to cookie handling.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Joomla
- Date Reserved
- 2026-05-26T10:06:17.657Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3688de84ec8817ab09d1e5
Added to database: 6/20/2026, 12:34:38 PM
Last enriched: 6/20/2026, 12:48:50 PM
Last updated: 6/20/2026, 2:03:55 PM
Views: 13
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