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    CVE-2026-48946

    The K2 frontend article-attachment upload path accepts files whose extension is `.php`, and Apache's standard mod_php matches `\.php$` and executes them under the K2 web user. A K2 Author can upload a `shell.php`, then fetch `/media/k2/attachments/shell.php` and execute arbitrary PHP code in the web server's context.

    Published:Jun 25, 2026
    Last Modified:Jun 28, 2026
    EPS:Jun 25, 2026
    EPSS Score:0.00167
    CVSS Score:6.3

    Affected Products

    Vendor
    Getk2
    Product
    K2 Extension For Joomla

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs

    Related CVEs

    CVE-2026-48945 (CVSS 5.3) — The K2 article gallery upload path accepts a zip/tar archive, extracts it under `/media/k2/galleries/<id>/`, a…
    CVE-2026-48940 (CVSS 3.4) — A Joomla user with K2 "create item" rights (Author tier by default) can submit an article whose `embedVideo` P…
    CVE-2026-48941 (CVSS 6.5) — The K2 frontend `item.checkin` task accepts an unauthenticated `sigProFolder` query parameter and uses it dire…
    CVE-2026-48944 (CVSS 6.5) — The K2 frontend article-save handler accepts an `attachment[N][existing]` POST field that is concatenated with…
    CVE-2026-48942 (CVSS 6.1) — K2 ≤ 2.26 renders the `#__k2_users.image` column directly into HTML `src` attributes via two distinct template…
    CVE-2026-48943 (CVSS 6.5) — K2 ≤ 2.24 contains a mass-assignment defect in the K2 system user plugin `plg_user_k2`. A Registered Joomla us…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High