CVE-2026-3240 is a stored Cross-Site Scripting (XSS) vulnerability affecting Concrete CMS versions below 9.4.8. A highly privileged user, with permissions to edit a page containing a Legacy form element, can inject malicious scripts into the "Question" field, targeting other high-privilege accounts. This vulnerability has a CVSS v4.0 score of 4.8 (Medium), indicating a network-based attack with low attack complexity, requiring user interaction, and leading to low integrity impact. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 5, < 9.4.8CPE match | cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:* | ||
< 9.4.8CPE matchmatch criteria | cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.