CVE-2026-16290Public exploitNetwork attack vector

Member roster disclosure via authorization-free AJAX handler

Published Aug 6, 2026 · Updated Aug 6, 2026

Missing authorization in ProfileGrid before 6.0.0.0 allows remote attackers to disclose private group member rosters via AJAX. The pm_get_all_users_from_group handler is exposed through WordPress's unauthenticated AJAX hook and returns the requested group's roster without a nonce or permission check. Any remote visitor who supplies an enumerable group ID can obtain member names, WordPress user IDs, online state, and suspension state even when roster visibility is disabled.

CVSS severity5.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in ProfileGrid before 6.0.0.0 allows remote attackers to disclose private group member rosters via AJAX. The pm_get_all_users_from_group handler is exposed through WordPress's unauthenticated AJAX hook and returns the requested group's roster without a nonce or permission check. Any remote visitor who supplies an enumerable group ID can obtain member names, WordPress user IDs, online state, and suspension state even when roster visibility is disabled.

The record

CVE
CVE-2026-16290
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
EventPrime Events
Product
ProfileGrid
Classifications
CWE-862, T1087
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 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 <6.0.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

EventPrime Events · ProfileGridversion=0 <6.0.0.0

Published CVSS scores

5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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.

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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
Privilegesunauthenticated
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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