CVE-2026-34906

CRITICAL

Server-Side Template Injection (SSTI) in Wirtualna Uczelnia

Title source: cna
STIX 2.1

Description

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

References (2)

Core 2
Core References
Third Party Advisory third-party-advisory
https://cert.pl/posts/2026/06/CVE-2026-34906

Scores

CVSS v4 9.3
EPSS 0.0093
EPSS Percentile 55.9%
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-1336
Status published
Products (1)
Simple SA/Wirtualna Uczelnia < wu#2016.437.295#0#20260327_105545
Published Jun 02, 2026
Tracked Since Jun 02, 2026