CVE-2026-33386

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.

CVSS

No CVSS.

References

Link	Resource
https://cert.pl/posts/2026/05/CVE-2026-33384/
https://opensolution.org/home.html

Configurations

No configuration.

History

29 May 2026, 16:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-29 16:16

Updated : 2026-05-29 16:29

NVD link : CVE-2026-33386

Mitre link : CVE-2026-33386

CVE.ORG link : CVE-2026-33386

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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