CVE-2026-34906

CriticalCVSS 9.3

Published: 02/06/2026(UTC)Updated: 22/07/2026(UTC)Translated: 23/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.56%

43th percentile - higher than 43% of all known CVEs

Summary

In Wirtualna Uczelnia up to version wu#2016.437.295#0#20260327_105545, a Server-Side Template Injection (SSTI) vulnerability in the redirectToUrl endpoint allows an unauthenticated attacker to achieve remote code execution, including a reverse shell.

Risk Assessment

An unauthenticated attacker can execute arbitrary commands on the server, leading to full system compromise.

Recommendation

Upgrade Wirtualna Uczelnia to a version newer than wu#2016.437.295#0#20260327_105545 that includes the fix.

Original NVD description (English source)

Server-Side Template Injection (SSTI) in Wirtualna Uczelnia allows an unauthenticated attacker to perform Remote Code Execution (RCE). In the endpoint redirectToUrl and parameter redirectUrlParameter, insufficient input validation permits injection of arbitrary template expressions that are executed on the server. Successful exploitation can allow an attacker to run remote commands, including establishing a reverse shell. This issue affects Wirtualna Uczelnia versions up to wu#2016.437.295#0#20260327_105545