Joomla! Core - [20260802] - Improper CORS origin validation in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2 - An improper implementation prevented configured CORS origins from being properly validated in CORS requests.

Joomla! Core - [20260804] - Improper ACL checks for custom fields webservice endpoints in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2 - An improper access check allows unauthorized users to create fields for inaccessible components.

Joomla! Core - [20260806] - XSS through schema.org outputs in Joomla 5.1.0-5.4.7, 6.0.0-6.1.2 - Improper escaping flags lead to an XSS vector in schema.org markup outputs.

Joomla! Core - [20260806] - Improper ACL checks for category webservice endpoints in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2 - An improper access check allows unauthorized users to create categories via webservices endpoints.

Lack of output escaping leads to a XSS vector in the multilingual associations component.

Lack of output escaping leads to a XSS vector in the content history component.

Lack of output escaping leads to a XSS vector in the readmore links for comcontent.

Improperly built filter clauses lead to a SQL injection vulnerability in the search query for comfinder.

Improperly validated order clauses lead to a SQL injection vulnerability in comtags.

An improper validation of the search parameter of the commedia files API endpoint leads to a path traversal vulnerability.

Inadequate content filtering within the checkAttribute methods leads to XSS vulnerabilities in various components.

An improper access check allows privilege escalation through the comusers batch task.

An improper access check allowed low privileged users to edit the task types of existing scheduler tasks.

Lack of output escaping leads to a XSS vector in the feed modules.

Lack of CSRF token validation lead to a CSRF attack vector in the admin activation endpoint of comusers.

Lack of input filtering leads to an XSS vector in the HTML filter code.

An improper access check allows unauthorized users to access workflow stage and transition information.

An improper access check allows users to display a list of modules in the frontend.

An improper access check allows unauthorized users to access comprivacy datasets.

An improper access check allows unauthorized users to create custom fields via webservices endpoints.

Improper validation leads to a generic XSS vector in the language override feature.

An improper access check allows privileged users to overwrite media files without editing permissions.

An improper access check allows user to download vcard exports of comcontact contacts that are inaccessible.

Lack of validation leads to an XSS vulnerability in the MFA management views.

Lack of escaping leads to an XSS vulnerability in the file management view of comtemplates.

Lack of escaping leads to XSS vulnerabilities in modalreturn layouts of various components.

Lack of escaping leads to an XSS vulnerability in the update list view of cominstaller.

Lack of escaping leads to an XSS vulnerability in the generic image output layout.

The K2 frontend item.checkin task accepts an unauthenticated sigProFolder query parameter and uses it directly to address a JFolder::delete() call under /media/k2/galleries/

K2 ≤ 2.24 contains a mass-assignment defect in the K2 system user plugin plguserk2. A Registered Joomla user, by including the field K2UserForm=1 in a standard comusers profile.save POST, can write arbitrary values into the notes, image, and plugins columns of their own row in the #k2users table — none of which are exposed by the K2 frontend profile-edit form.