CVE-2026-33384

Session hijacking via unchanged pre-authentication identifier

Published May 29, 2026 · Updated May 29, 2026

Session fixation in OpenSolution Quick.Cms 6.8 and earlier allows attackers to hijack authenticated sessions via a fixed session ID. Quick.Cms accepts a session identifier before authentication and continues using the same value after the victim successfully authenticates. Exploitation requires a victim to use an identifier known to the attacker and then sign in, after which the attacker can assume the victim's authenticated session.

CVSS severity4.8
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session fixation in OpenSolution Quick.Cms 6.8 and earlier allows attackers to hijack authenticated sessions via a fixed session ID. Quick.Cms accepts a session identifier before authentication and continues using the same value after the victim successfully authenticates. Exploitation requires a victim to use an identifier known to the attacker and then sign in, after which the attacker can assume the victim's authenticated session.

The record

CVE
CVE-2026-33384
Published
May 29, 2026
Updated
May 29, 2026
Vendor
OpenSolution
Product
Quick.Cms
Classifications
CWE-384, CAPEC-61, T1550.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 29, 2026CVE publishedPublication date reported by the CVE source.
  2. May 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=6.8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

OpenSolution · Quick.Cmsversion=0 <=6.8

Published CVSS scores

4.8CERT.PLCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-384Session Fixation
CAPEC-61Session Fixation
T1550.004Use Alternate Authentication Material: Web Session Cookie

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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