Critical Plesk Vulnerability Allows Arbitrary Command Execution
Severity: High (Score: 70.5)
Sources: Cybersecuritynews, Gbhackers
Published: · Updated:
Keywords: critical, plesk, vulnerability, users, execute, commands, arbitrary
Severity indicators: critical, vulnerability
Summary
A critical vulnerability in Plesk, tracked as CVE-2026-44962, was disclosed on May 29, 2026. This flaw enables authenticated low-privileged users to execute arbitrary operating system commands on affected servers. The vulnerability is linked to improper input handling in the APS Application Catalog component of Plesk for Linux. Security researchers have raised alarms about the potential for exploitation, which could lead to significant impacts on server integrity and data security. The issue has been documented in both the National Vulnerability Database and GitHub Advisory Database. Administrators are urged to assess their systems for this vulnerability and apply necessary mitigations. The scope of impact includes all versions of Plesk that utilize the affected component. Key Points: • CVE-2026-44962 allows low-privileged users to execute arbitrary commands on Plesk servers. • The vulnerability is linked to improper input handling in the APS Application Catalog. • Affected systems include all versions of Plesk for Linux utilizing the vulnerable component.
Detailed Analysis
**Impact** The vulnerability affects Plesk servers running the APS Application Catalog component, specifically on Linux platforms. Authenticated users with low privileges can execute arbitrary operating system commands, potentially compromising server integrity and availability. The scope includes any organization using vulnerable Plesk versions globally, with no specific sectors or numbers provided. Data at risk includes any information accessible or stored on the compromised servers. **Technical Details** The vulnerability, tracked as CVE-2026-44962, results from improper input handling in the APS Application Catalog functionality. Exploitation requires authenticated access, enabling arbitrary command execution at the operating system level. No specific malware, tools, or IOCs are mentioned. The attack occurs at the execution stage of the kill chain, leveraging command injection techniques. **Recommended Response** Apply patches or updates provided by Plesk addressing CVE-2026-44962 immediately. Restrict access to the APS Application Catalog component to trusted users only and monitor for unusual command execution activities on affected servers. Deploy detection rules focusing on anomalous system commands initiated by low-privileged users. If patches are unavailable, increase logging and review authentication logs for suspicious activity.
Source articles (2)
- Critical Plesk Vulnerability Let Users Execute Arbitrary Commands on the Server — Cybersecuritynews · 2026-06-01
A newly disclosed critical vulnerability in Plesk, tracked as CVE-2026-44962, is raising serious security concerns after researchers confirmed it can allow authenticated users to execute arbitrary ope… - Critical Plesk Vulnerability Lets Users Execute Server Commands — Gbhackers · 2026-06-01
A newly disclosed critical vulnerability in Plesk is raising serious security concerns after researchers confirmed that low-privileged users can execute arbitrary commands on affected servers. Tracked…
Timeline
- 2026-05-29 — CVE-2026-44962 published: A critical vulnerability in Plesk was disclosed, allowing command execution by low-privileged users.
- 2026-06-01 — Security concerns raised: Researchers confirmed the vulnerability's potential for exploitation, urging immediate attention from administrators.
CVEs
Related entities
- Zero-day Exploit (Attack Type)
- CWE-20 - Improper Input Validation (Cwe)
- CWE-78 - OS Command Injection (Cwe)
- T1059 - Command and Scripting Interpreter (Mitre Attack)
- Linux (Platform)
- Plesk (Platform)