TI-2020-18170 Aliases CVE-2020-35710 GHSA-35ch-vqm2-376r

Parallels Remote Application Server (RAS) 18 allows remote attackers to discover an…

LOW 27CWE-200Published 2020-12-25 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: Low · None · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-200.

Summary

Parallels Remote Application Server (RAS) 18 allows remote attackers to discover an intranet IP address because submission of the login form (even with blank credentials) provides this address to the attacker's client for use as a "host" value. In other words, after an attacker's web browser sent a request to the login form, it would automatically send a second request to a RASHTML5Gateway/socket.io URI with something like "host":"192.168.###.###" in the POST data.

Why it matters now

EPSS 0.01695 77th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:parallels:remote_application_server:18.0:::::::*	18.0	Vulnerable	Parallels

cpe:2.3:a:parallels:remote_application_server:18.0:*:*:*:*:*:*:* Versions 18.0 Vulnerable ·Parallels

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-35710
2026-10-03 Alias added: GHSA-35ch-vqm2-376r

References

Exploit 1

https://www.elladodelmal.com/2020/12/blue-team-red-team-como-parallels-ras.html

Advisory 1

https://twitter.com/amadapa/status/1342407005110218753

TI-2022-19453 The Web Client of Parallels Remote Application Server v18.0 is vulnerable to Host Header… CVSS 3.1HIGH 8.1
TI-2020-12480 Parallels Remote Application Server (RAS) 17.1.1 has a Business Logic Error causing… CVSS 3.1CRITICAL 9.9
TI-2023-24642 The Remote Application Server in Parallels RAS before 19.2.23975 does not segment… CVSS 3.1CRITICAL 10.0
TI-2017-06858 In the web interface of Parallels Remote Application Server (RAS) 15.5 Build 16140, a… CVSS 3.0HIGH 7.5
TI-2025-00332 Link following in Parallels Desktop CVSS 3.0HIGH 7.8
TI-2020-07200 Parallels Remote Application Server credentials management errors CVSS 3.1HIGH 7.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences