How severe is CVE-2025-8259?

CVE-2025-8259 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-2025-8259 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-8259?

CVE-2025-8259 affects Vaelsys. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-8259?

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-2025-8259 have an EU (EUVD) identifier?

Yes. CVE-2025-8259 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22854.

When was CVE-2025-8259 published?

CVE-2025-8259 was published on 2025-07-28 and last updated on 2026-06-17.

CVE-2025-8259

CVE-2025-8259 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-78.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v2: 7.5
CVSS v4: 5.5
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-22854
Weakness: CWE-78
Affected product: Vaelsys
Published: 2025-07-28
Last modified: 2026-06-17

Description

A vulnerability was identified in Vaelsys VaelsysV4 up to 5.1.0/5.4.0. Affected by this issue is the function execute_DataObjectProc of the file /grid/vgrid_server.php of the component Web interface. Such manipulation of the argument xajaxargs leads to os command injection. The attack can be executed remotely. The exploit is publicly available and might be used. Upgrading to version 5.1.1 and 5.4.1 can resolve this issue. It is suggested to upgrade the affected component.

Frequently asked questions

What is CVE-2025-8259?: A vulnerability was identified in Vaelsys VaelsysV4 up to 5.1.0/5.4.0. Affected by this issue is the function execute_DataObjectProc of the file /grid/vgrid_server.php of the component Web interface. Such manipulation of the argument xajaxargs leads to os command injection. The attack can be executed remotely. The exploit is publicly available and might be used. Upgrading to version 5.1.1 and 5.4.1 can resolve this issue. It is suggested to upgrade the affected component.
How severe is CVE-2025-8259?: CVE-2025-8259 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-2025-8259 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-8259?: CVE-2025-8259 affects Vaelsys. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-8259?: 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-2025-8259 have an EU (EUVD) identifier?: Yes. CVE-2025-8259 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22854.
When was CVE-2025-8259 published?: CVE-2025-8259 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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