CVE-2026-24561Public exploitNetwork attack vectorHinoki check available

Subscriber-level user information disclosure via unchecked member endpoint

Published Jan 23, 2026 · Updated Jan 23, 2026

Missing authorization in FluentBoards 1.91.1 and earlier allows remote authenticated users to access WordPress user information. The member information REST handler accepts a user-controlled WordPress user ID and returns the matching user record without checking the caller’s FluentBoards permissions. Subscriber-level access is sufficient, and the disclosed data is limited to information returned by the affected member endpoints.

CVSS severity5.4
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authorization in FluentBoards 1.91.1 and earlier allows remote authenticated users to access WordPress user information. The member information REST handler accepts a user-controlled WordPress user ID and returns the matching user record without checking the caller’s FluentBoards permissions. Subscriber-level access is sufficient, and the disclosed data is limited to information returned by the affected member endpoints.

The record

CVE
CVE-2026-24561
Published
Jan 23, 2026
Updated
Jan 23, 2026
Vendor
Mahmudul Hasan Arif
Product
FluentBoards
Classifications
CWE-862, T1087
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 23, 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=n/a <=<= 1.91.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Mahmudul Hasan Arif · FluentBoardsversion=n/a <=<= 1.91.1

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
4.3WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/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.

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 exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1087Account Discovery

Public exploit references

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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