Critical severity · published Jul 28, 2025
CVE-2025-8261
Vaelsys VaelsysV4 User Creation vgrid_server.php improper authorization
9.8
CVSS
0.7%
EPSS
No
On KEV
Description
A weakness has been identified in Vaelsys VaelsysV4 4.1.0. This vulnerability affects unknown code of the file /grid/vgrid_server.php of the component User Creation Handler. Executing a manipulation can lead to improper authorization. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The real existence of this vulnerability is still doubted at the moment. The vendor explains: "Based on Vaelsys' analysis, the reported behavior does not allow actions beyond those already permitted to authenticated administrative users, and no change in system configuration or operational practices is necessary."
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VA
VaelsysV4 · Vaelsys
4.1.0 · source: vendor
VA
Vaelsys · Vaelsys
4.1.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-8261
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-8261
Exploit
https://github.com/waiwai24/0101/blob/main/CVEs/Vaelsys/Unauthorized_User_Creation_Vulnerability_Exists_in_Vaelsys_V4_Platform.md
vaelsys.github.io
https://vaelsys.github.io/security-advisory/advisories/VSEC_V4_2025_07_0003.html
vuldb.com
https://vuldb.com/submit/616924
vuldb.com
https://vuldb.com/vuln/317849
vuldb.com
https://vuldb.com/vuln/317849/cti
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