CVE-2026-34906

Server-Side Template Injection (SSTI) in Wirtualna Uczelnia

Assigner: CERT-PL
Reserved: 31.03.2026 Published: 02.06.2026 Updated: 02.06.2026

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

Metrics

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
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	Low
Attack Complexity	Low	Integrity	High	Integrity	Low
Attack Requirements	None	Availability	High	Availability	Low
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Simple SA
Product	Wirtualna Uczelnia
Versions	Default: unaffected affected from 0 to wu#2016.437.295#0#20260327_105545 (incl.)

Vendor

Simple SA

Product

Wirtualna Uczelnia

Versions

Default: unaffected

affected from 0 to wu#2016.437.295#0#20260327_105545 (incl.)

Credits

Dawid Bakaj - VIPentest finder

References

Problem Types