{"id":"CVE-2026-34906","aliases":["EUVD-2026-33902","GHSA-4pqh-3f6p-63c5"],"status":"published","title":"Server-Side Template Injection (SSTI) in Wirtualna Uczelnia","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.\n\nThis issue affects Wirtualna Uczelnia versions up to wu#2016.437.295#0#20260327_105545","severity":{"version":"4.0","score":9.3,"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","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00557,"percentile":0.46773,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1336"],"published":"2026-06-02T08:31:02Z","modified":"2026-07-22T19:10:00Z","products":[{"vendor":"simple sa","product":"wirtualna uczelnia"}],"references":[{"url":"https://cert.pl/posts/2026/06/CVE-2026-34906","tags":["third-party-advisory"]},{"url":"https://simple.com.pl/branze/edukacyjna/","tags":["product"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34906"},{"url":"https://simple.com.pl/branze/edukacyjna"},{"url":"https://github.com/advisories/GHSA-4pqh-3f6p-63c5"}],"sources":{"cve":[{"id":"CVE-2026-34906","title":"Server-Side Template Injection (SSTI) in Wirtualna Uczelnia","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.\n\nThis issue affects Wirtualna Uczelnia versions up to wu#2016.437.295#0#20260327_105545","status":"published","published":"2026-06-02T08:31:02.827Z","modified":"2026-06-02T13:15:12.913Z","cvss":[{"version":"4.0","score":9.3,"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","level":"critical","assessor":"cna"}],"cwes":["CWE-1336"],"updated_at":"2026-11-02T14:20:13.962274Z"}],"euvd":[{"id":"EUVD-2026-33902","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.\n\nThis issue affects Wirtualna Uczelnia versions up to wu#2016.437.295#0#20260327_105545","status":"published","published":"2026-06-02T08:31:02Z","modified":"2026-06-02T13:15:12Z","cvss":[{"version":"4.0","score":9.3,"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","level":"critical"}],"updated_at":"2026-11-02T18:20:56.59039Z"}],"ghsa":[{"id":"GHSA-4pqh-3f6p-63c5","title":"Server-Side Template Injection (SSTI) in Wirtualna Uczelnia allows an unauthenticated attacker to...","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.\n\nThis issue affects Wirtualna Uczelnia versions up to wu#2016.437.295#0#20260327_105545","status":"published","published":"2026-06-02T12:31:25Z","modified":"2026-06-02T12:31:32Z","cvss":[{"version":"4.0","score":9.3,"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/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","level":"critical"}],"cwes":["CWE-1336"],"updated_at":"2026-11-02T15:08:29.586291Z"}],"nvd":[{"id":"CVE-2026-34906","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.\n\nThis issue affects Wirtualna Uczelnia versions up to wu#2016.437.295#0#20260327_105545","status":"published","published":"2026-06-02T10:16:22.733Z","modified":"2026-07-22T19:10:00.12Z","cvss":[{"version":"4.0","score":9.3,"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/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","level":"critical","assessor":"secondary"}],"cwes":["CWE-1336"],"updated_at":"2026-11-02T14:12:22.022466Z"}]}}