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TI-2026-59992 Aliases CVE-2026-87927GHSA-wxg4-xmxc-6qm6

MaxSite CMS through 109.6 Local File Inclusion via ajax dispatcher

Priority HIGH 77CWE-98Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
Low · High · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-98.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00588 48th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MaxSiteMaxSite CMS0.78 – 109.6—No fix listedCNA
  • MaxSite CMS VendorMaxSite Affected 0.78 – 109.6 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-87927
  2. 2026-10-03 Alias added: GHSA-wxg4-xmxc-6qm6

References

Exploit 1

Other 3

  • TI-2026-59994 MaxSite CMS through 109.6 Authentication Bypass via Hardcoded Encryption Key CVSS 4.0CRITICAL 9.3
  • TI-2026-59995 MaxSite CMS through 109.6 PHP Object Injection via ci_session CVSS 4.0CRITICAL 9.2
  • TI-2026-02931 MaxSite CMS MarkItUp Preview AJAX Endpoint preview-ajax.php eval code injection CVSS 4.0MEDIUM 6.9
  • TI-2025-11324 MaxSite CMS save-file-ajax.php unrestricted upload CVSS 4.0MEDIUM 5.3
  • TI-2026-06140 MaxSite CMS ushki Plugin cross site scripting CVSS 4.0MEDIUM 4.8
  • TI-2026-06139 MaxSite CMS Guestbook Plugin cross site scripting CVSS 4.0MEDIUM 4.8
See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences