CVE-2026-33386
Published: May 29, 2026
Modified: May 29, 2026
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.
| Vendor | Product | Versions |
|---|---|---|
OpenSolution | QuickCMS | affected 0 - <= 6.8 |
Weaknesses (CWE)
References
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