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CVE-2026-4540— projectworlds Online Notes Sharing System Parameters login.php sql injection

Quick assessment

Affected
projectworlds Online Notes Sharing System
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Projectworlds Online Notes Sharing System是Projectworlds开源的一个在线笔记共享系统。 Projectworlds Online Notes Sharing System 1.0版本存在安全漏洞，该漏洞源于对文件/login.php中参数User的错误操作，可能导致SQL注入。

CVSS 7.3 · High EPSS 0.36% · P29
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I. Basic Information for CVE-2026-4540

Vulnerability Information
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Vulnerability Title
projectworlds Online Notes Sharing System Parameters login.php sql injection
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
SQL命令中使用的特殊元素转义处理不恰当(SQL注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Projectworlds Online Notes Sharing System 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Projectworlds Online Notes Sharing System是Projectworlds开源的一个在线笔记共享系统。 Projectworlds Online Notes Sharing System 1.0版本存在安全漏洞，该漏洞源于对文件/login.php中参数User的错误操作，可能导致SQL注入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
projectworlds Online Notes Sharing System 1.0 -

II. Public POCs for CVE-2026-4540

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7927 chars
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III. Intelligence Information for CVE-2026-4540

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Vendor Advisories for CVE-2026-4540 (2)

News Coverage for CVE-2026-4540 (1)

IV. Related Vulnerabilities

Same product: Online Notes Sharing System
Same vendor: projectworlds
Same weakness: CWE-89

V. Comments for CVE-2026-4540

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