CVE-2026-33384

4.8 mediumEPSS 0.2%

Medium (4.8). EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

4.8 medium

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

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 4% of CVEs (scores of 2026-10-31)
CWE: CWE-384
Published: 2026-05-29
Modified: 2026-07-21
Record from: the NVD, synced 2026-10-19

References

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

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