Vulnerability · Published Jul 20, 2026 · Assigned by CERT-PL

CVE-2026-57309Blind SQL Injection in Windu CMS

Critical 9.3

In plain English

A critical-severity SQL injection in Windu CMS from JCD. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).

Severity (CVSS 4.0)9.3Critical

Exploit odds (30 days)0.5%top 54.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A Blind SQL injection vulnerability has been identified in Windu CMS. A remote unauthenticated attacker is able to inject SQL syntax into URL path in HTTP header resulting in Blind SQL Injection. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 4.1 but may also affect other versions.

Affected products (as reported)

Vendor	Product	Versions
JCD	Windu CMS	4.1

Weakness: CWE-89 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

References

https://cert.pl/posts/2026/07/CVE-2026-57309 third-party-advisory
https://windu.org product