Vulnerability Description
QuickCMS is vulnerable to Cross-Site Scripting (XSS) through its insecure HTTP-based plugin‑fetching mechanism. A malicious attacker can perform a Man‑in‑the‑Middle (MITM) attack by impersonating the opensolution.org server and serving arbitrary HTML or JavaScript at the plugin list endpoint. When a user accesses the plugin page, the malicious content is automatically fetched, rendered, and executed. This issue was fixed in a patch to version 6.8 published on 15.05.2026, deployments without this patch are still vulnerable.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-33386?
CVE-2026-33386 is a documented vulnerability. QuickCMS is vulnerable to Cross-Site Scripting (XSS) through its insecure HTTP-based plugin‑fetching mechanism. A malicious attacker can perform a Man‑in‑the‑Middle (MITM) attack by impersonating the ...
How severe is CVE-2026-33386?
CVSS scoring is not yet available for CVE-2026-33386. Check NVD for updates.
Is there a patch for CVE-2026-33386?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.