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Vulnerability record · CVE-2020-27659 · published 30 November 2020

CVE-2020-27659: Synology safeaccess cross-site scripting vulnerability

Synology · Safeaccess

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.

4.8 CVSS 3.1 Medium EPSS 5.2% · top 7.8% CWE-79 · Cross-site scripting
4.8CVSS 3.1 base score, v2 3.5
5.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 4 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/thomasfady/Synology_SA_20_25 ExploitThird Party Advisory
https://www.synology.com/security/advisory/Synology_SA_20_25 Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1087 ExploitThird Party Advisory
https://github.com/thomasfady/Synology_SA_20_25 ExploitThird Party Advisory
https://www.synology.com/security/advisory/Synology_SA_20_25 Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1087 ExploitThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-27659), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.