What is CVE-2026-4540?

CVE-2026-4540 is a high-severity vulnerability in Projectworlds Online Notes Sharing System, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.3/10. Published 2026-03-22.

How severe is CVE-2026-4540?

High severity. CVSS v3 base score is 7.3 out of 10.

SQL Injection in Projectworlds Online Notes Sharing System

CVE-2026-4540

A vulnerability was detected in projectworlds Online Notes Sharing System 1.0. This issue affects some unknown processing of the file /login.php of the component Parameters Handler. The manipulation of the argument User results in sql injection. The attack can be executed remotely. The exploit is now public and may be used.

EPSS: 0.004 (28.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

Projectworlds Online Notes Sharing System — versions 1.0

Weakness classification (CWE)

References

cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (issue-tracking, exploit)

Frequently asked questions

What is CVE-2026-4540?: CVE-2026-4540 is a high-severity vulnerability in Projectworlds Online Notes Sharing System, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.3/10. Published 2026-03-22.
How severe is CVE-2026-4540?: High severity. CVSS v3 base score is 7.3 out of 10.