CVE-2026-54357Network attack vector

Site-admin settings modification via role-blind ACL checks

Published Jun 12, 2026 · Updated Jun 12, 2026

Improper authorization in MISP before 2.5.40 allows remote authenticated users with organization-admin rights to alter site-admin settings. UserSettingsController and UserSetting authorize targets by matching organization IDs without excluding roles that grant site administration. Access requires organization-admin rights and a site-admin target in the same organization, exposing settings and login-profile data to reading or modification.

CVSS severity5.1
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in MISP before 2.5.40 allows remote authenticated users with organization-admin rights to alter site-admin settings. UserSettingsController and UserSetting authorize targets by matching organization IDs without excluding roles that grant site administration. Access requires organization-admin rights and a site-admin target in the same organization, exposing settings and login-profile data to reading or modification.

The record

CVE
CVE-2026-54357
Published
Jun 12, 2026
Updated
Jun 12, 2026
Vendor
MISP Project
Product
MISP
Classifications
CWE-863, CWE-639, CAPEC-1
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 12, 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 <2.5.40

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

MISP Project · MISPversion=0 <2.5.40

Published CVSS scores

5.1CIRCLCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/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)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-639Authorization Bypass Through User-Controlled Key
CAPEC-1Accessing Functionality Not Properly Constrained by ACLs

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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