How severe is CVE-2025-8261?

CVE-2025-8261 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-8261 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-8261?

CVE-2025-8261 affects Vaelsys. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-8261?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-8261 have an EU (EUVD) identifier?

Yes. CVE-2025-8261 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22856.

When was CVE-2025-8261 published?

CVE-2025-8261 was published on 2025-07-28 and last updated on 2026-06-17.

CVE-2025-8261

CVE-2025-8261 is a high-severity vulnerability in Vaelsys with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-266.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v2: 7.5
CVSS v4: 5.5
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-22856
Weakness: CWE-266
Affected product: Vaelsys
Published: 2025-07-28
Last modified: 2026-06-17

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."

Frequently asked questions

What is CVE-2025-8261?: 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."
How severe is CVE-2025-8261?: CVE-2025-8261 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-8261 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-8261?: CVE-2025-8261 affects Vaelsys. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-8261?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-8261 have an EU (EUVD) identifier?: Yes. CVE-2025-8261 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22856.
When was CVE-2025-8261 published?: CVE-2025-8261 was published on 2025-07-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:vaelsys:vaelsys:4.1.0:*:*:*:*:*:*:*

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