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

Quick assessment

Affected
Simple SA Wirtualna Uczelnia
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Simple SA Wirtualna Uczelnia是Simple SA公司的一款高校管理信息系统软件。 Simple SA Wirtualna Uczelnia wu#2016.437.295#0#20260327_105545及之前版本存在安全漏洞，该漏洞源于服务器端模板注入，在redirectToUrl端点和redirectUrlParameter参数中，输入验证不足导致注入任意模板表达式，可能导致未经身份验证的攻击者执行远程代码，包括建立反向shell。

AI Predicted 9.8 Difficulty: Easy EPSS 0.89% · P59

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Simple SA Wirtualna Uczelnia ≤ wu#2016.437.295#0#20260327_105545 affected
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I. Basic Information for CVE-2026-34906

Vulnerability Information
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Vulnerability Title
Server-Side Template Injection (SSTI) in Wirtualna Uczelnia
Source: CVE Program / CVE List V5
Vulnerability 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
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1336
Source: CVE Program / CVE List V5
Vulnerability Title
Simple SA Wirtualna Uczelnia 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Simple SA Wirtualna Uczelnia是Simple SA公司的一款高校管理信息系统软件。 Simple SA Wirtualna Uczelnia wu#2016.437.295#0#20260327_105545及之前版本存在安全漏洞，该漏洞源于服务器端模板注入，在redirectToUrl端点和redirectUrlParameter参数中，输入验证不足导致注入任意模板表达式，可能导致未经身份验证的攻击者执行远程代码，包括建立反向shell。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Simple SA Wirtualna Uczelnia 0 ~ wu#2016.437.295#0#20260327_105545 -

II. Public POCs for CVE-2026-34906

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III. Intelligence Information for CVE-2026-34906

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Security Blog Posts for CVE-2026-34906 (1)

Vendor Pages for CVE-2026-34906 (1)

IV. Related Vulnerabilities

Same product: Wirtualna Uczelnia
Same vendor: Simple SA
Same weakness: CWE-1336

V. Comments for CVE-2026-34906

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