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TI-2021-14427 Aliases CVE-2021-35976GHSA-55cx-26p7-7qcw

The feature to preview a website in Plesk Obsidian 18.0.0 through 18.0.32 on Linux is…

Priority LOW 30CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

The feature to preview a website in Plesk Obsidian 18.0.0 through 18.0.32 on Linux is vulnerable to reflected XSS via the /plesk-site-preview/ PATH, aka PFSI-62467. The attacker could execute JavaScript code in the victim's browser by using the link to preview sites hosted on the server. Authentication is not required to exploit the vulnerability.

Why it matters now

EPSS 0.01148 67th 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

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:plesk:obsidian:*:*:*:*:*:*:*:*18.0.0 – 18.0.32VulnerablePlesk
  • cpe:2.3:a:plesk:obsidian:*:*:*:*:*:*:*:* Versions 18.0.0 – 18.0.32 Vulnerable ·Plesk

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-35976
  2. 2026-10-03 Alias added: GHSA-55cx-26p7-7qcw

References

Exploit 1

Advisory 1

Other 1

  • TI-2023-09824 A Host Header Injection issue on the Login page of Plesk Obsidian through 18.0.49 allows… CVSS 3.1MEDIUM 6.1
  • TI-2022-22206 Plesk Obsidian allows a CSRF attack, e.g., via the /api/v2/cli/commands REST API to… CVSS 3.1MEDIUM 6.5
  • TI-2020-09285 A GET-based XSS reflected vulnerability in Plesk Obsidian 18.0.17 allows remote… CVSS 3.1MEDIUM 6.1

Sources

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