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TI-2026-27138 Aliases CVE-2026-34906GHSA-4pqh-3f6p-63c5

Server-Side Template Injection (SSTI) in Wirtualna Uczelnia

Priority MEDIUM 49CWE-1336Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-1336.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00557 46th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Simple SAWirtualna Uczelniaup to wu#2016.437.295#0#20260327_105545—No fix listedCNA
  • Wirtualna Uczelnia VendorSimple SA Affected up to wu#2016.437.295#0#20260327_105545 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-34906
  2. 2026-10-03 Alias added: GHSA-4pqh-3f6p-63c5
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Advisory 1

Other 1

  • TI-2025-11134 RCE in Wirtualna Uczelnia CVSS 4.0CRITICAL 9.3
  • TI-2026-00925 SQL Injection in SIMPLE.ERP CVSS 4.0HIGH 8.6
  • TI-2024-08140 Privilege Escalation in SIMPLE.ERP CVSS 4.0HIGH 7.7
  • TI-2024-08139 Protocol Downgrade in SIMPLE.ERP CVSS 4.0HIGH 8.3
  • TI-2025-08561 SQL Injection in SIMPLE.ERP CVSS 4.0HIGH 7.1
  • TI-2019-05993 The Simple - Better Banking application 2.45.0 through 2.45.3 (fixed in 2.46.0) for… CVSS 3.0MEDIUM 6.8
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences