CVE-2026-92984Network attack vectorHinoki check available

Account hijacking via query-string session fixation

Published Sep 17, 2026 · Updated Sep 21, 2026

Session fixation in HUBzero CMS 2.2.32 and earlier allows remote attackers to hijack user accounts through crafted session identifiers. Hubzero\Session\Manager accepts PHPSESSID from the query string or any request variable when no session cookie exists, then continues using that server-known identifier. A victim must follow the crafted link and authenticate under the fixed session before the attacker can replay the identifier and access that account.

CVSS severity8.5
High
EPSS probability0.46%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Session fixation in HUBzero CMS 2.2.32 and earlier allows remote attackers to hijack user accounts through crafted session identifiers. Hubzero\Session\Manager accepts PHPSESSID from the query string or any request variable when no session cookie exists, then continues using that server-known identifier. A victim must follow the crafted link and authenticate under the fixed session before the attacker can replay the identifier and access that account.

The record

CVE
CVE-2026-92984
Published
Sep 17, 2026
Updated
Sep 21, 2026
Vendor
HUBzero
Product
HUBzero CMS
Classifications
CWE-384, T1539
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 21, 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 <=2.2.32

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HUBzero · HUBzero CMSversion=0 <=2.2.32

Published CVSS scores

8.5VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
8.1VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A: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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-384Session Fixation
T1539Steal 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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