PT-2026-22866 · Unknown · Concrete Cms

M3Dium · Published 2026-03-04 · Updated 2026-03-04 · CVE-2026-3241

Positive Technologies (AI Summary)

CVSS v3.1

4.8

Medium

Base vector

AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Concrete CMS versions prior to 9.4.8

Description A stored cross-site scripting (XSS) issue exists in the "Legacy Form" block. An authenticated user with appropriate permissions can inject a JavaScript payload into the options of a multiple-choice question (Checkbox List, Radio Buttons, or Select Box). This payload is then executed in the browser of any user who views the page containing the form. The affected block allows for the injection of persistent JavaScript code.

Recommendations Update Concrete CMS to version 9.4.8 or later.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-3241

GHSA-F4VQ-PJ32-GR4Q

Affected Products

Concrete Cms

References · 10

• https://github.com/concretecms/concretecms/pull/12826 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-3241 · Security Note
• https://osv.dev/vulnerability/CVE-2026-3241 · Vendor Advisory
• https://documentation.concretecms.org/9-x/developers/introduction/version-history/948-release-notes · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-f4vq-pj32-gr4q · Vendor Advisory
• https://github.com/concretecms/concretecms · Note
• https://twitter.com/cyberbivash/status/2029061297837330695 · Twitter Post
• https://t.me/CVEtracker/46275 · Telegram Post
• https://twitter.com/CVEarity/status/2029168997699338446 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2029182762393993494 · Twitter Post