What’s Vulnerable › Vulnerabilities

CVE-2020-27659

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-11-30 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• Synology Safe Access: before 1.2.3-0234 — fixed in 1.2.3-0234

How to fix

Upgrade to a fixed version: Synology Safe Access 1.2.3-0234. Check the vendor advisory for mitigations.

References

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

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