CVE-2026-3242

MEDIUM
2026-03-04 ff5b8ace-8b95-4078-9743-eac1ca5451de GHSA-w9qg-chfh-g3q9
4.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 22:05 vuln.today
PoC Detected
Mar 04, 2026 - 21:31 vuln.today
Public exploit code
Patch Released
Mar 04, 2026 - 21:31 nvd
Patch available
CVE Published
Mar 04, 2026 - 03:16 nvd
MEDIUM 4.8

Tags

XSS Concrete Cms

Description

In Concrete CMS below version 9.4.8, a rogue administrator can add stored XSS via the Switch Language block.  The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N.  Thanks M3dium for reporting.

Analysis

Stored XSS in Concrete CMS versions before 9.4.8 allows authenticated administrators to inject malicious scripts through the Switch Language block, affecting any site where a rogue admin account exists. Public exploit code is available for this vulnerability. …

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Remediation

Within 30 days: Identify affected systems running Concrete CMS below and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

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Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +24
POC: +20

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CVE-2026-3242 vulnerability details – vuln.today
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