CVE-2026-4540 projectworlds Online Notes Sharing System Parameters login.php sql injection
Remote attackers can exploit SQL injection in the login parameter to read or modify database contents in the Online Notes Sharing System.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4540?
CVE-2026-4540 is a medium-severity SQL injection vulnerability in projectworlds Online Notes Sharing System, published on 22 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-4540?
How do I fix CVE-2026-4540?
No fix has been published for CVE-2026-4540 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-4540 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4540 exists.
Sources
Also known as GHSA-jff7-f2mj-769g.