CVE-2020-27659

Name: CVE-2020-27659
Creator: NVD / NIST
Published: 2020-11-30T10:15:10.72+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 5.14%

Last modified Jun 17, 2026

CVE-2020-27659 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. 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.. EPSS estimates a 5.14% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.8/10

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

EPSS Probability

5.14%

91.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Synology	Safeaccess	< 1.2.3-0234

References

https://github.com/thomasfady/Synology_SA_20_25Exploit, Third Party Advisory
https://www.synology.com/security/advisory/Synology_SA_20_25Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1087Exploit, Third Party Advisory
https://github.com/thomasfady/Synology_SA_20_25Exploit, Third Party Advisory
https://www.synology.com/security/advisory/Synology_SA_20_25Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1087Exploit, Third Party Advisory

Timeline

Published: Nov 30, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is 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.

How severe is CVE-2020-27659?

CVE-2020-27659 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 5.14% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27659?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-27659?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST