Vulnerabilities CVE-2026-8139

CVE-2026-8139

Low

Open

TLP:CLEAR

Concrete CMS 9.5.0 and below is vulnerable to Stored XSS via external-link page cvName

NVD CVE.org

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Description

Concrete CMS 9.5.0 and below is vulnerable to Stored XSS via external-link page cvName because updateCollectionAliasExternal bypasses being sanitized. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.0 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori (Tenzai) for reporting.

Details

CVSS Score: 2.0
EPSS Score ⓘ: 0.15%

4.8th percentile
CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Confidence: 90%
Published: May 21, 2026
Last Modified: May 22, 2026

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