CVE-2026-87898: CWE-78 OS Command Injection in WebPros Plesk extension "Site Import"
OS command injection in Plesk allows remote authenticated users to execute arbitrary code with root privileges.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-87898) is an OS command injection flaw classified under CWE-78 in the Plesk extension "Site Import" by WebPros. It permits remote authenticated attackers to execute arbitrary commands on the underlying operating system with root-level privileges. The affected versions are >=1.6.6 and <=1.12.1. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges required beyond authentication, no user interaction, and high impact on confidentiality, integrity, availability, and scope.
Potential Impact
Successful exploitation allows an authenticated remote attacker to execute arbitrary OS commands as root, potentially leading to full system compromise, data loss, or service disruption. Given the root privilege level, the impact is critical.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the affected Plesk extension to trusted users only and monitor for suspicious activity related to the "Site Import" functionality.
CVE-2026-87898: CWE-78 OS Command Injection in WebPros Plesk extension "Site Import"
Description
OS command injection in Plesk allows remote authenticated users to execute arbitrary code with root privileges.
CVSS v4.0
Score 9.4critical
Affected software
WebPros
Plesk extension "Site Import"
pkg:github/webpros/plesk-site-importRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-87898) is an OS command injection flaw classified under CWE-78 in the Plesk extension "Site Import" by WebPros. It permits remote authenticated attackers to execute arbitrary commands on the underlying operating system with root-level privileges. The affected versions are >=1.6.6 and <=1.12.1. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges required beyond authentication, no user interaction, and high impact on confidentiality, integrity, availability, and scope.
Potential Impact
Successful exploitation allows an authenticated remote attacker to execute arbitrary OS commands as root, potentially leading to full system compromise, data loss, or service disruption. Given the root privilege level, the impact is critical.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the affected Plesk extension to trusted users only and monitor for suspicious activity related to the "Site Import" functionality.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- hackerone
- Date Reserved
- 2026-09-09T15:00:00.573Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ab43089f7a7c5410643142b
Added to database: 09/23/2026, 20:03:21 UTC
Last enriched: 09/23/2026, 20:17:57 UTC
Last updated: 09/24/2026, 01:57:04 UTC
Views: 8
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