CVE-2026-87927

MaxSite CMS through 109.6 Local File Inclusion via ajax dispatcher

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

MaxSite · MaxSite CMS

CVSS v4.0 VULNCHECK

8.8 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULNCHECK

8.2 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

EPSS

0.59% chance of exploitation in the next 30 days, 47th percentile

Published

2026-09-09

Updated

2026-09-24

Proof-of-concept exploits (1)

• EviL0rd/maxsite-cve1/blob/main/2026.09.08-maxsite-cms-ajax-lfi-path-traversal.md

References

• CVE Record
• NVD entry

Related

• CVE-2026-87928
• CVE-2026-87929
• CVE-2026-87930