CVE-2020-27659 json
Multiple cross-site scripting (XSS) vulnerabilities in Synology SafeAccess before 1.2.3-0234 allow remote attackers to inject arbitrary web…
published 2020-11-30 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-20166
- cvss
- 8.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 5.2%
- EPSS 5.2% chance of exploitation in 30 days, percentile 92%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Synology Safe Access 1.2.3-0234
Exploit prediction
5.20% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- talosintelligence.com https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1087 referenced PoC, tagged "exploit" by a source, unverified
- github.com https://github.com/thomasfady/Synology_SA_20_25 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.4 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 3.5 | AV:N/AC:M/Au:S/C:N/I:P/A:N |
Affected products
- Synology Safe Access
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
talosintelligence.com
/vulnerability_reports/TALOS-2020-1087
exploit, third-party-advisory
-
github.com
/thomasfady/Synology_SA_20_25
exploit, third-party-advisory
-
synology.com
/security/advisory/Synology_SA_20_25
vendor-advisory
Sources
- CVE List CVE-2020-27659
- NVD CVE-2020-27659
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