RCE in Max-3000 Maxsite_cms
CVE-2026-3395
A flaw has been found in MaxSite CMS up to 109.1. This impacts the function eval of the file application/maxsite/admin/plugins/editor_markitup/preview-ajax.php of the component MarkItUp Preview AJAX Endpoint. Executing a manipulation can l…
EPSS: 0.001 (17.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Max-3000 Maxsite_cms
- Maxsite Cms — versions 109.0, 109.1, 109.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- VDB-348281 | MaxSite CMS MarkItUp Preview AJAX Endpoint preview-ajax.php eval code injection (technical-description, Third Party Advisory, VDB Entry, vdb-entry)
- VDB-348281 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, Permissions Required, permissions-required, VDB Entry)
- Submit #762169 | maxsite CMS CMS 109.1 Code Injection (Third Party Advisory, VDB Entry, third-party-advisory)
- cna@vuldb.com (Patch, patch)
- cna@vuldb.com (Product, product)
Frequently asked questions
- What is CVE-2026-3395?
- CVE-2026-3395 is a high-severity vulnerability in Max-3000 Maxsite_cms, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.3/10. Published 2026-03-01.
- How severe is CVE-2026-3395?
- High severity. CVSS v3 base score is 7.3 out of 10.
- Is CVE-2026-3395 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.