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VULNERABILITIES

CVE-2026-33386 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NDDVolerionCVSS-B:4.7 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://cert.pl/posts/2026/05/CVE-2026-33384/ [email protected]AdvisoryBundleRemedy
https://opensolution.org/home.html [email protected]Vendor

Weakness Enumeration

CWE-IDCWE NameSource
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')[email protected]

Affected Products

ProductVersions
OpenSolution QuickCMS
<= 6.8

CPE

  • cpe:2.3:a:opensolution:quick.cms:*:*:*:*:*:*:*:*
  • cpe:2.3:a:opensolution:quick_cms:*:*:*:*:*:*:*:*

Remediation

  • Upgrade: 6.8moderate effort

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-33386
NVD Published Date:
May 29, 2026
NVD Last Modified:
Jul 21, 2026
Source:
[email protected]
CVE-2026-33386 Details - Not Deferred