What is CVE-2020-27659?

CVE-2020-27659 is a high-severity vulnerability in Synology Safe Access, classified under Cross-site Scripting. CVSS score: 8.4/10. Published 2020-11-30.

How severe is CVE-2020-27659?

High severity. CVSS v3 base score is 8.4 out of 10.

Is CVE-2020-27659 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Synology Safe Access

CVE-2020-27659

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (54.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H.

Affected products

Synology Safe Access — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

www.synology.com/security/advisory/Synology_SA_20_25 (x_refsource_CONFIRM)
www.talosintelligence.com/vulnerability_reports/TALOS-2020-1087 (x_refsource_MISC)
github.com/thomasfady/Synology_SA_20_25 (x_refsource_MISC)

Frequently asked questions

What is CVE-2020-27659?: CVE-2020-27659 is a high-severity vulnerability in Synology Safe Access, classified under Cross-site Scripting. CVSS score: 8.4/10. Published 2020-11-30.
How severe is CVE-2020-27659?: High severity. CVSS v3 base score is 8.4 out of 10.
Is CVE-2020-27659 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.