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Description

A flaw has been found in MaxSite CMS up to 109.1. This impacts the function eval of the file application/maxsite/admin/plugins/editor_markitup/preview-ajax.php of the component MarkItUp Preview AJAX Endpoint. Executing a manipulation can lead to code injection. It is possible to launch the attack remotely. The exploit has been published and may be used. Upgrading to version 109.2 will fix this issue. This patch is called 08937a3c5d672a242d68f53e9fccf8a748820ef3. You should upgrade the affected component. The code maintainer was informed beforehand about the issues. He reacted very fast and highly professional.

PUBLISHED Reserved 2026-02-28 | Published 2026-03-01 | Updated 2026-03-01 | Assigner VulDB




MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
HIGH: 7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
HIGH: 7.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
7.5AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C

Problem types

Code Injection

Injection

Product status

109.0
affected

109.1
affected

109.2
unaffected

Timeline

2026-02-28:Advisory disclosed
2026-02-28:VulDB entry created
2026-03-01:VulDB entry last update

Credits

mrsolo404 (VulDB User) reporter

mrsolo404 (VulDB User) analyst

VulDB coordinator

References

vuldb.com/?id.348281 (VDB-348281 | MaxSite CMS MarkItUp Preview AJAX Endpoint preview-ajax.php eval code injection) vdb-entry technical-description

vuldb.com/?ctiid.348281 (VDB-348281 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/?submit.762169 (Submit #762169 | maxsite CMS CMS 109.1 Code Injection) third-party-advisory

github.com/...ommit/08937a3c5d672a242d68f53e9fccf8a748820ef3 patch

github.com/maxsite/cms/ product

cve.org (CVE-2026-3395)

nvd.nist.gov (CVE-2026-3395)

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