How severe is CVE-2025-12346?

CVE-2025-12346 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-12346 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-12346?

CVE-2025-12346 affects Max-3000 Maxsite Cms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-12346?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-12346 have an EU (EUVD) identifier?

Yes. CVE-2025-12346 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-36425.

When was CVE-2025-12346 published?

CVE-2025-12346 was published on 2025-10-28 and last updated on 2026-06-17.

CVE-2025-12346

CVE-2025-12346 is a medium-severity vulnerability in Max-3000 Maxsite Cms with a CVSS 3.x base score of 6.3. 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-434.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.5
CVSS v4: 2.1
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-36425
Weakness: CWE-434
Affected product: Max-3000 Maxsite Cms
Published: 2025-10-28
Last modified: 2026-06-17

Description

A vulnerability was detected in MaxSite CMS up to 109. This vulnerability affects unknown code of the file application/maxsite/admin/plugins/auto_post/uploads-require-maxsite.php of the component HTTP Header Handler. Performing manipulation of the argument X-Requested-FileName/X-Requested-FileUpDir results in unrestricted upload. Remote exploitation of the attack is possible. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Frequently asked questions

What is CVE-2025-12346?: A vulnerability was detected in MaxSite CMS up to 109. This vulnerability affects unknown code of the file application/maxsite/admin/plugins/auto_post/uploads-require-maxsite.php of the component HTTP Header Handler. Performing manipulation of the argument X-Requested-FileName/X-Requested-FileUpDir results in unrestricted upload. Remote exploitation of the attack is possible. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
How severe is CVE-2025-12346?: CVE-2025-12346 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-12346 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-12346?: CVE-2025-12346 affects Max-3000 Maxsite Cms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-12346?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-12346 have an EU (EUVD) identifier?: Yes. CVE-2025-12346 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-36425.
When was CVE-2025-12346 published?: CVE-2025-12346 was published on 2025-10-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:max-3000:maxsite_cms:*:*:*:*:*:*:*:*

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