CVE-2025-53106Network attack vector

Administrator access via wrong-subject token authorization

Published Jul 2, 2025 · Updated Jul 2, 2025

Improper authorization in Graylog Open Server 6.2.0 through 6.2.3 allows remote authenticated users to gain administrator access. UsersResource.generateNewToken checked token-creation permission against the requester rather than the requested token owner. The same flaw affects 6.3.0-alpha.1 through 6.3.0-rc.1; any Graylog account can exploit it when personal token creation is enabled.

CVSS severity8.8
High
EPSS probability0.55%
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 Graylog Open Server 6.2.0 through 6.2.3 allows remote authenticated users to gain administrator access. UsersResource.generateNewToken checked token-creation permission against the requester rather than the requested token owner. The same flaw affects 6.3.0-alpha.1 through 6.3.0-rc.1; any Graylog account can exploit it when personal token creation is enabled.

The record

CVE
CVE-2025-53106
Published
Jul 2, 2025
Updated
Jul 2, 2025
Vendor
Graylog
Product
Graylog Open Server
Classifications
CWE-285, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 2, 2025Record 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=>= 6.2.0, < 6.2.4
  2. Affected versionversion=>= 6.3.0-alpha.1, < 6.3.0-rc.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Graylog · Graylog Open Serverversion=>= 6.2.0, < 6.2.4; version=>= 6.3.0-alpha.1, < 6.3.0-rc.2

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

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.

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

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-285Improper Authorization
T1098Account Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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