HIGH CWE-94
CVE-2026-3395
MaxSite CMS MarkItUp Preview AJAX Endpoint preview-ajax.php eval code injection
MaxSite·CMS
7.3/ 10
CVSS 3.1
High severity
4.0%
EPSS exploit odds
Chance of exploitation in the next 30 days
Higher than 91% of all CVEs
Not listed
CISA KEV catalog
No confirmed in-the-wild exploitation on CISA's list, but a public proof of concept exists.
Timeline
- Published
- Mar 1, 2026
- Updated
- Mar 2, 2026
- First covered
- Jul 11, 2026
- Latest story
- 4 months ago
Summary
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.
CWE-94Code Injection
Attack profile
Attack vectorNetwork
ComplexityLow
PrivilegesNone
User interactionNone
ScopeUnchanged
ConfidentialityLow
IntegrityLow
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:CAffected products
- MaxSite CMS109.0109.1
References
CVE.org recordcve.org
NVD entrynvd.nist.gov
VDB-348281 | MaxSite CMS MarkItUp Preview AJAX Endpoint preview-ajax.php eval code injectionvuldb.com
VDB-348281 | CTI Indicators (IOB, IOC, TTP, IOA)vuldb.com
Submit #762169 | maxsite CMS CMS 109.1 Code Injectionvuldb.com
Patchgithub.com
Productgithub.com