CVE-2026-3395CRITICAL 9.8EPSS p38.0%

CVE-2026-3395CVE-2026-3395

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.49% probability of exploitation · percentile 38.0% · 2026-06-19T12:03:05Z
Published2026-03-01
Last modified2026-04-29

Underlying weaknesses· 2

CWE-74CWE-94

References

  1. https://github.com/maxsite/cms/
  2. https://github.com/maxsite/cms/commit/08937a3c5d672a242d68f53e9fccf8a748820ef3
  3. https://vuldb.com/?ctiid.348281
  4. https://vuldb.com/?id.348281
  5. https://vuldb.com/?submit.762169

2

TypeTargetConfidenceTier
WeaknessImproper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')cwe-740%live
WeaknessImproper Control of Generation of Code ('Code Injection')cwe-940%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.