# CVE-2026-48909: JoomShaper SP LMS remote code execution via cookie deserialization

Source: https://junglewise.ai/threats/cve-2026-48909-joomshaper-sp-lms-remote-code-execution-via-cookie  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-20. Updated: 2026-06-21  
License: CC BY 4.0 with a link back

CVE-2026-48909 · Severity: info · CVSS 9.5 · Published 2026-06-20

JoomShaper SP LMS, a learning management system extension for Joomla, contains a critical security flaw that allows attackers to take full control of the server. By sending a specially crafted web request containing malicious cookie data, an unauthenticated user can execute their own code. This could lead to a complete compromise of the website, theft of student or instructor data, and total service disruption.

Vendors: [JoomShaper](https://junglewise.ai/threats/vendors/joomshaper).

## Quick answers

**Is CVE-2026-48909 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-48909 being exploited in the wild.

**How severe is CVE-2026-48909?** Informational severity, with a CVSS score of 9.5, published 20 June 2026.

**Which products and versions are affected?** JoomShaper SP LMS 1.0.0-4.1.3.

**Is there a fix for CVE-2026-48909?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-48909 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-48909?** Check whether you run JoomShaper SP LMS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The SP LMS (com_splms) extension for Joomla fails to properly validate user-supplied data within cookies before passing it to a PHP deserialization function. This 'Deserialization of Untrusted Data' (CWE-502) vulnerability allows a remote, unauthenticated attacker to perform object injection. By crafting a malicious serialized payload in a cookie, an attacker can trigger arbitrary code execution in the context of the web server. The issue is resolved in version 4.1.4.

## Affected products

- JoomShaper SP LMS extension for Joomla 1.0.0-4.1.3

## Timeline

- 2026-06-20: disclosed
- 2026-06-20: advisory

## References

- [https://www.joomshaper.com/](https://www.joomshaper.com/)