CVE-2025-8261Public exploitNetwork attack vector

Disputed account creation via crafted xajax requests

Published Jul 28, 2025 · Updated Apr 15, 2026

A report of improper authorization in Vaelsys VaelsysV4 4.1.0 says remote attackers can create users through crafted xajax requests. The report says /grid/vgrid_server.php processes an xajax user-creation call without enforcing session authorization, but Vaelsys could not reproduce that path. Vaelsys found that only authenticated administrators can create accounts, an action already allowed by their role, and therefore identifies no security impact.

CVSS severity7.3
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A report of improper authorization in Vaelsys VaelsysV4 4.1.0 says remote attackers can create users through crafted xajax requests. The report says /grid/vgrid_server.php processes an xajax user-creation call without enforcing session authorization, but Vaelsys could not reproduce that path. Vaelsys found that only authenticated administrators can create accounts, an action already allowed by their role, and therefore identifies no security impact.

The record

CVE
CVE-2025-8261
Published
Jul 28, 2025
Updated
Apr 15, 2026
Vendor
Vaelsys
Product
VaelsysV4
Classifications
CWE-285, CWE-266, T1136
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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=4.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Vaelsys · VaelsysV4version=4.1.0

Published CVSS scores

7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-285Improper Authorization
CWE-266Incorrect Privilege Assignment
T1136Create Account

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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