CVE-2026-3244 - Concrete CMS below version 9.4.8 is vulnerable to Stored XSS in Search Results via Page Names

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MEDIUM

Concrete CMS below version 9.4.8 is vulnerable to Stored XSS in Search Results via Page Names

Published Mar 4, 2026

4.8

MEDIUM

CVSS 4.0

EPSS 0.28%

Description

In Concrete CMS below version 9.4.8, A stored cross-site scripting (XSS) vulnerability exists in the search block where page names and content are rendered without proper HTML encoding in search results. This allows authenticated, rogue administrators to inject malicious JavaScript through page names that executes when users search for and view those pages in search results. 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 zolpak for reporting

Affected products

Vendor Concrete CMS Product Concrete CMS Default
unaffected
Affected
- ≥ 5, < 9.4.8

Default status is the baseline for the product. Each version can override it (patched versions can be marked unaffected).

Vendor	Product	Default status	Versions
Concrete CMS	Concrete CMS	unaffected	Affected ≥ 5, < 9.4.8

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-79

Cross-site Scripting (XSS)

References (5)

https://documentation.concretecms.org/9-x/developers/introduction/version-history/948-release-notes
PatchRelease NotesVendor Advisory
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-9355
Advisory
https://github.com/advisories/GHSA-mm5f-5rqw-574f
Advisory
https://github.com/concretecms/concretecms/pull/12826
ExploitIssue TrackingVendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-3244

Link	Providers	Tags
https://documentation.concretecms.org/9-x/developers/introduction/version-history/948-release-notes		PatchRelease NotesVendor Advisory
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-9355		Advisory
https://github.com/advisories/GHSA-mm5f-5rqw-574f		Advisory
https://github.com/concretecms/concretecms/pull/12826		ExploitIssue TrackingVendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-3244