Vulnerability-Lookup

GHSA-4PQH-3F6P-63C5

Vulnerability from github – Published: 2026-06-02 12:31 – Updated: 2026-06-02 12:31

Details

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

Severity

9.3 (Critical)


                  
                    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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-34906"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1336"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-02T10:16:22Z",
    "severity": "CRITICAL"
  },
  "details": "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.\n\nThis issue affects Wirtualna Uczelnia versions up to\u00a0wu#2016.437.295#0#20260327_105545",
  "id": "GHSA-4pqh-3f6p-63c5",
  "modified": "2026-06-02T12:31:25Z",
  "published": "2026-06-02T12:31:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34906"
    },
    {
      "type": "WEB",
      "url": "https://cert.pl/posts/2026/06/CVE-2026-34906"
    },
    {
      "type": "WEB",
      "url": "https://simple.com.pl/branze/edukacyjna"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-34906 (GCVE-0-2026-34906)

Vulnerability from cvelistv5 – Published: 2026-06-02 08:31 – Updated: 2026-06-02 13:15

Title

Server-Side Template Injection (SSTI) in Wirtualna Uczelnia

Summary

Severity

9.3 (Critical)


                        
                          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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-02 13:14 UTC

CWE

CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine

Assigner

CERT-PL ENISA root Scorecard

References

2 references

URL	Tags
https://cert.pl/posts/2026/06/CVE-2026-34906	third-party-advisory
https://simple.com.pl/branze/edukacyjna/	product

Impacted products

1 product

Vendor	Product	Version
Simple SA	Wirtualna Uczelnia	Affected: 0 , ≤ wu#2016.437.295#0#20260327_105545 (custom)

Credits

Dawid Bakaj - VIPentest

Show details on NVD website

JSON

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-34906",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-02T13:14:32.560940Z",
                "version": "2.0.3"
              },
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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      ],
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          "type": "finder",
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        }
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          "tags": [
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          "url": "https://simple.com.pl/branze/edukacyjna/"
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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GHSA-4PQH-3F6P-63C5

CVE-2026-34906 (GCVE-0-2026-34906)

Tags

Sightings

Nomenclature

Related by attack behaviour