Vulnerability in Maxsite Cms
CVE-2026-87927
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N.
EPSS exploit prediction
EPSS: 0.006 (47.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/maxsite/cms (product)
- github.com/EviL0rd/maxsite-cve1/blob/main/2026.09.08-maxsite-cms-ajax-lfi-path-… (technical-description, exploit)
- github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/applicatio… (technical-description)
- github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/applicatio… (technical-description)
- VulnCheck Advisory: MaxSite CMS through 109.6 Local File Inclusion via ajax dispatcher (third-party-advisory)
Frequently asked questions
- What is CVE-2026-87927?
- CVE-2026-87927 is a high-severity vulnerability in Maxsite Cms, classified under PHP Remote File Inclusion. CVSS score: 8.2/10. Published 2026-09-09.
- How severe is CVE-2026-87927?
- High severity. CVSS v3 base score is 8.2 out of 10.