getk2 K2 Extension 1.0-2.26 on Joomla profile.save K2UserForm dynamically-determined object attributes

Summaryinfo

A vulnerability identified as critical has been detected in getk2 K2 Extension 1.0-2.26 on Joomla. Affected by this issue is the function profile.save. Performing a manipulation of the argument K2UserForm results in dynamically-determined object attributes. This vulnerability is known as CVE-2026-48943. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, was found in getk2 K2 Extension 1.0-2.26 on Joomla. This affects the function profile.save. The manipulation of the argument K2UserForm with an unknown input leads to a dynamically-determined object attributes vulnerability. CWE is classifying the issue as CWE-915. The product receives input from an upstream component that specifies multiple attributes, properties, or fields that are to be initialized or updated in an object, but it does not properly control which attributes can be modified. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

K2 ≤ 2.24 contains a mass-assignment defect in the K2 system user plugin `plg_user_k2`. A Registered Joomla user, by including the field `K2UserForm=1` in a standard `com_users` `profile.save` POST, can write arbitrary values into the `notes`, `image`, and `plugins` columns of their own row in the `#__k2_users` table — none of which are exposed by the K2 frontend profile-edit form.

The weakness was published by Matan Bahar. This vulnerability is uniquely identified as CVE-2026-48943 since 05/26/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/25/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Joomla Component

Vendor

• getk2

Name

• K2 Extension

Version

• 1.0-2.26

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Entryinfo

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