PT-2026-44893 · Opensolution · Quick.Cms

Jakub Lipiński · Published 2026-05-29 · Updated 2026-05-29 · CVE-2026-33384

NVD

CVSS v4.0

4.8

Medium

Base vector

AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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.

Fix

Session Fixation

Weakness Enumeration

CWE-384

Related Identifiers

CVE-2026-33384

Affected Products

Quick.Cms

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-33384 · Security Note
• https://opensolution.org/home.html · Note
• https://cert.pl/posts/2026/05/CVE-2026-33384 · Note
• https://twitter.com/f1tym1/status/2060393028305523016 · Twitter Post