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Vulnerability record · CVE-2026-87927 · published 9 September 2026

CVE-2026-87927: PHP remote file inclusion vulnerability

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.

8.8 CVSS 4.0 High EPSS 0.59% · top 54.1% CWE-98 · PHP remote file inclusion Deferred
8.8CVSS 4.0 base score
0.59%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
9 Sep 2026Last modified by NVD

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.

CVSS: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:

References

LinkTags
https://github.com/EviL0rd/maxsite-cve1/blob/main/2026.09.08-maxsite-cms-ajax-lfi-path-traversal.md
https://github.com/maxsite/cms
https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/application/views/ajax.php#L17-L42
https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/application/views/require-maxsite.php#L13-L
https://www.vulncheck.com/advisories/maxsite-cms-through-109.6-local-file-inclusion-via-ajax-dispatcher

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.1CVE-2026-87902WordPress Core Remote File Inclusion VulnerabilityAn unauthenticated attacker can make `get_page_template()` page-template resolution include a chosen readable local `.php` file outside the active th…KEVEPSS 18%8.8CVE-2025-68645Zimbra Webmail Classic UI RestFilter local file inclusionZimbra Collaboration Suite 10.0 and 10.1 mishandle user-supplied parameters in the RestFilter servlet of the Webmail Classic UI, allowing local file …KEVEPSS 49%analysed

Source: NIST National Vulnerability Database (record CVE-2026-87927), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.