CVE-2026-33384: CWE-384 Session Fixation in OpenSolution QuickCMS
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.
AI Analysis
Technical Summary
CVE-2026-33384 is a session fixation vulnerability in OpenSolution QuickCMS where the session ID is assigned before user authentication and is not regenerated after login. This behavior enables attackers to set a known session ID for a victim, which can be used to hijack the victim's authenticated session. The issue was fixed in QuickCMS version 6.8, released on May 15, 2026. No known exploits are reported in the wild, and the vulnerability has a medium severity rating with a CVSS 4.8 score.
Potential Impact
An attacker who can set or predict a session ID before authentication may hijack the victim's authenticated session, potentially gaining unauthorized access to the victim's account or data within QuickCMS. The impact is limited to session hijacking and depends on the attacker's ability to fix the session ID prior to victim login.
Mitigation Recommendations
Apply the official patch by upgrading QuickCMS to version 6.8 or later, which fixes the session fixation vulnerability. Deployments that have not applied this patch remain vulnerable. No other mitigation or temporary fix is indicated in the available data.
CVE-2026-33384: CWE-384 Session Fixation in OpenSolution QuickCMS
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.
CVSS v4.0
Score 4.8medium
Affected software
pkg:github/opensolution/quickcmsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-33384 is a session fixation vulnerability in OpenSolution QuickCMS where the session ID is assigned before user authentication and is not regenerated after login. This behavior enables attackers to set a known session ID for a victim, which can be used to hijack the victim's authenticated session. The issue was fixed in QuickCMS version 6.8, released on May 15, 2026. No known exploits are reported in the wild, and the vulnerability has a medium severity rating with a CVSS 4.8 score.
Potential Impact
An attacker who can set or predict a session ID before authentication may hijack the victim's authenticated session, potentially gaining unauthorized access to the victim's account or data within QuickCMS. The impact is limited to session hijacking and depends on the attacker's ability to fix the session ID prior to victim login.
Mitigation Recommendations
Apply the official patch by upgrading QuickCMS to version 6.8 or later, which fixes the session fixation vulnerability. Deployments that have not applied this patch remain vulnerable. No other mitigation or temporary fix is indicated in the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- CERT-PL
- Date Reserved
- 2026-03-19T10:45:47.735Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a19bc63e29bf47b50f702dc
Added to database: 05/29/2026, 16:18:43 UTC
Last enriched: 05/29/2026, 16:34:42 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 57
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