CVE-2026-4540Public exploitNetwork attack vector

Unauthenticated database access via login SQL injection

Published Mar 22, 2026 · Updated Mar 22, 2026

SQL injection in Projectworlds Online Notes Sharing Platform 1.0 allows remote attackers to manipulate database queries through login.php. The login handler inserts the POST user parameter directly into a MySQL query without sanitization or parameter binding, enabling boolean-, error-, and time-based injection. No authentication is required, and successful exploitation permits unauthorized database reads or writes within the web application's database privileges.

CVSS severity7.3
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in Projectworlds Online Notes Sharing Platform 1.0 allows remote attackers to manipulate database queries through login.php. The login handler inserts the POST user parameter directly into a MySQL query without sanitization or parameter binding, enabling boolean-, error-, and time-based injection. No authentication is required, and successful exploitation permits unauthorized database reads or writes within the web application's database privileges.

The record

CVE
CVE-2026-4540
Published
Mar 22, 2026
Updated
Mar 22, 2026
Vendor
Project Worlds
Product
Online Notes Sharing Platform
Classifications
CWE-89, CWE-74, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Project Worlds · Online Notes Sharing Platformversion=1.0

Published CVSS scores

7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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