Description
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.
References (2)
Core 2
Core References
Third Party Advisory third-party-advisory
https://cert.pl/posts/2026/05/CVE-2026-33384/
Product product
https://opensolution.org/home.html
Scores
CVSS v4
4.8
EPSS
0.0015
EPSS Percentile
4.9%
CVSS:4.0/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
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-384
Status
published
Products (1)
OpenSolution/QuickCMS
< 6.8
Published
May 29, 2026
Tracked Since
May 29, 2026