Vulnerability · Published Oct 28, 2025 · Assigned by VulDB

CVE-2025-12347MaxSite CMS save-file-ajax.php unrestricted upload

Medium 6.3

In plain English

A medium-severity unrestricted file upload in CMS from MaxSite. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)0.4%top 66.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A flaw has been found in MaxSite CMS up to 109. This issue affects some unknown processing of the file application/maxsite/admin/plugins/editor_files/save-file-ajax.php. Executing manipulation of the argument file_path/content can lead to unrestricted upload. The attack can be executed remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products (as reported)

Vendor	Product	Versions
MaxSite	CMS	109

Weakness: CWE-434, CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-330137 | MaxSite CMS save-file-ajax.php unrestricted upload vdb-entry, technical-description
VDB-330137 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #674552 | MaxSite CMS 109 file writing vulnerability third-party-advisory
https://note-hxlab.wetolink.com/share/lIWZkTHQPSVh exploit