EUVD-2026-12366Severity by source
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:P/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
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
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:P/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
Lifecycle Timeline
8DescriptionCVE.org
A security flaw has been discovered in CMS Made Simple up to 2.2.21. Impacted is an unknown function of the file admin/listusers.php of the component User Management Module. Performing a manipulation of the argument Message results in cross site scripting. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks.
AnalysisAI
A cross-site scripting (XSS) vulnerability exists in CMS Made Simple versions up to 2.2.21 affecting the User Management Module's admin/listusers.php file. An attacker with high-level privileges can inject malicious JavaScript through the Message parameter to compromise other users' sessions or steal sensitive data. …
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Vulnerability AssessmentAI
| Risk Assessment | While the CVSS v3.1 score of 2.4 appears extremely low, the actual risk profile is notably higher when examining supporting indicators. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with low-level administrative or moderator privileges could craft a malicious URL containing JavaScript payload in the Message parameter of admin/listusers.php and socially engineer a higher-privileged administrator into clicking it. When the administrator visits the page, the unescaped JavaScript executes in their browser session, allowing the attacker to steal session tokens, modify user accounts, or perform administrative actions on behalf of the compromised administrator. … |
| Remediation | Immediately upgrade CMS Made Simple to version 2.2.22 or later, which contains patches addressing the XSS vulnerability in the Message parameter processing. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
During next maintenance window: Apply vendor patches when convenient. …
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