P4Verified

CVE-2026-18111: concrete cms before 8.5.21 (exclusive), from 9.0.0 (inclusive), before 9.5.3 (exclusive); +1 more affected products

CVE-2026-18111. CVSS 3.1 base score 6.1 (MEDIUM, NVD). EPSS 0.00345 (percentile 0.26314), scored 14-Oct-2026.

Affected technology

concrete cms · before 8.5.21 (exclusive)
concretecms

concrete cms · from 9.0.0 (inclusive), before 9.5.3 (exclusive)
concretecms

Concrete CMS · 9.0.0 through 9.5.2
Concrete CMS

Description’s affected range: before 9.5.3 was vulnerable to stored cross-site scripting (XSS) in the Feature

Component: Not specified by the source

Attack conditions (Source advisory, CVSS 4.0): Network (remote) · High privileges required · Passive user interaction

What an attacker can do

Source advisory’s CVSS 4.0 assessment (base score 8.5/10) rates confidentiality, integrity and availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 15-Oct-2026 20:21 UTC

CWE: CWE-306
CCR priority: 24.5 /100 (P4)
CVSS 3.1: 6.1 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N · NVD
EPSS: 0.00345 · percentile 0.26314 · 2026-10-14
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-15 20:17:11.213245+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-18111.html