CVE-2026-33384

Name: CVE-2026-33384
Creator: NVD / NIST
Published: 2026-05-29T16:16:25.417+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 0.15%

Last modified Jun 17, 2026

CVE-2026-33384 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. QuickCMS allows a user's session identifier to be set before authentication. The value of this session ID stays the same after authentication. EPSS estimates a 0.15% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 4.0

4.8/10

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

EPSS Probability

0.15%

4.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-384

References

Timeline

Published: May 29, 2026
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2026-33384?

How severe is CVE-2026-33384?

CVE-2026-33384 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.15% probability of exploitation in the next 30 days.

How do I fix CVE-2026-33384?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-33384?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST