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    CVE-2026-33384

    QuickCMS allows a user's session identifier to be set before authentication. The value of this session ID stays the same after authentication. This behaviour enables an attacker to fix a session ID for a victim and later hijack the authenticated session. This issue was fixed in a patch to version 6.8 published on 15.05.2026, deployments without this patch are still vulnerable.

    Published:May 29, 2026
    Last Modified:May 29, 2026
    EPS:May 29, 2026
    EPSS Score:
    CVSS Score:4.8

    Affected Products

    Vendor
    Opensolution
    Product
    Quick.cms

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-384 Session Fixation

    Related CVEs

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    CVE-2026-33386 (CVSS 2.3) — QuickCMS is vulnerable to Cross-Site Scripting (XSS) through its insecure HTTP-based plugin‑fetching mechanism…
    CVE-2021-47981 (CVSS 5.1) — Quick.CMS 6.7 contains a cross-site scripting vulnerability in the sliders form that allows authenticated atta…
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    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