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.

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.

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

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.

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/

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