Vulnerability · Published Sep 9, 2026 · Assigned by VulnCheck
CVE-2026-87927MaxSite CMS through 109.6 Local File Inclusion via ajax dispatcher
High 8.2
In plain English
A high-severity security flaw in MaxSite CMS from MaxSite. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).
Severity (CVSS 3.1)8.2High
Exploit odds (30 days)0.6%top 51.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
MaxSite CMS through 109.6 contains a local file inclusion vulnerability in the ajax and require-maxsite dispatchers that allows unauthenticated attackers to execute privileged handler files by supplying base64-encoded path traversal sequences. Attackers can bypass path validation checks and execute admin-gated handler actions without authentication to access sensitive functionality.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| MaxSite | MaxSite CMS | 0.78 – through 109.6 |
Weakness: CWE-98 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
References
- https://github.com/maxsite/cms product
- https://github.com/EviL0rd/maxsite-cve1/blob/main/2026.09.08-maxsite-cms-ajax-lfi-path-traversal.md exploit, technical-description
- https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/application/views/ajax.php#L17-L42 technical-description
- https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/application/views/require-maxsite.php#L13-L29 technical-description
- VulnCheck Advisory: MaxSite CMS through 109.6 Local File Inclusion via ajax dispatcher third-party-advisory