Arbitrary file upload in Max-3000 Maxsite Cms
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (31.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Max-3000 Maxsite Cms
- Maxsite Cms — versions 109
Weakness classification (CWE)
Public proof-of-concept exploits
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- note-hxlab.wetolink.com/share/8QmDZCddHvyR (Exploit, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2025-12346?
- CVE-2025-12346 is a medium-severity vulnerability in Max-3000 Maxsite Cms, classified under Improper Access Control. CVSS score: 6.3/10. Published 2025-10-28.
- How severe is CVE-2025-12346?
- Medium severity. CVSS v3 base score is 6.3 out of 10.
- Is CVE-2025-12346 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.