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Fencer Intel
critical 9.3

CVE-2025-34101 json

Serviio Media Server Unauthenticated Command Injection via checkStreamUrl VIDEO Parameter

published last yr. modified 4mo ago also EUVD-2025-21036

cvss
9.3
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
4.4%
EPSS 4.4% chance of exploitation in 30 days, percentile 91%
public exploits
1
Metasploit

Summary

An unauthenticated command injection vulnerability exists in Serviio Media Server versions 1.4 through 1.8 on Windows, in the /rest/action API endpoint exposed by the console component (default port 23423). The checkStreamUrl method accepts a VIDEO parameter that is passed unsanitized to a call to cmd.exe, enabling arbitrary command execution under the privileges of the web server. No authentication is required to exploit this issue, as the REST API is exposed by default and lacks access controls.

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Timeline

  1. First public exploit (Metasploit exploit/windows/http/serviio_checkstreamurl_cmd_exec)
  2. Published

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
last yr.

Exploit prediction

4.36% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • Metasploit exploit/windows/http/serviio_checkstreamurl_cmd_exec Serviio Media Server checkStreamUrl Command Execution metasploit exploit, excellent rank, 2017-05-03
  • zeroscience.mk https://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5408.php referenced PoC, tagged "exploit" by a source, unverified
  • packetstorm.news https://packetstorm.news/files/id/142387 referenced PoC, tagged "exploit" by a source, unverified
  • raw.githubusercontent.com https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/http/serviio_checkstreamurl_cmd_exec.rb referenced PoC, tagged "exploit" by a source, unverified
  • exploit-db.com https://www.exploit-db.com/exploits/42023 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 9.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 4.0 9.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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

Affected products

  • Serviio Media Server

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command
  • CWE-306 Missing Authentication for Critical Functionality
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.