CVE-2026-34906 CRITICAL

CVE-2026-34906: Server-Side Template Injection (SSTI) in Wirtualna Uczelnia

Vendor Simple Sa
Product Wirtualna Uczelnia
Weakness CWE-1336
Published June 2, 2026
Last update June 2, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

June 2, 2026 CVE published
June 2, 2026 Record updated