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WebPros disclosed CVE-2026-58046, a blind SQL injection flaw in the Plesk XML-RPC API that affects all Plesk versions earlier than 18.0.79.4. The vulnerability allows a remote authenticated user with low privileges, including customer- or reseller-level access, to query the Plesk database and read arbitrary contents. Plesk warned that exposed data can include administrator credentials, creating a path to full server compromise.
The issue is classified as CWE-89 and carries a CVSS v3.1 vector of AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H, reflecting high impact across confidentiality, integrity, and availability. Plesk has patched the flaw in 18.0.79.4 and urged administrators to update immediately; for systems that cannot be upgraded at once, the vendor recommended mitigations in panel.ini to enforce strict API protocol version validation or to restrict XML API access to trusted IP addresses only. The Canadian Centre for Cyber Security also issued advisory AV26-761, directing organizations to apply the vendor guidance.
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The Canadian Centre for Cyber Security published advisory AV26-761 about CVE-2026-58046, warning that WebPros Plesk is affected by a blind SQL injection flaw in the XML-RPC API. The advisory told users and administrators to review vendor guidance and apply updates as available.
Plesk disclosed CVE-2026-58046 as a blind SQL injection vulnerability affecting versions earlier than 18.0.79.4 and said it could allow low-privileged authenticated users to read arbitrary database contents, including administrator credentials. Plesk stated the issue was patched in version 18.0.79.4 and provided mitigations for systems that could not be upgraded immediately.
Plesk said CVE-2026-58046, a blind SQL injection flaw in the XML-RPC API, was responsibly disclosed by Aziz Knani. The source does not provide a date for the disclosure event.
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WebPros disclosed **CVE-2026-64636**, a blind SQL injection vulnerability in **Plesk Obsidian** affecting both Linux and Windows deployments. The flaw impacts Plesk for Linux versions `18.0.51` through `18.0.80` and Plesk for Windows `18.0.80` and earlier; WebPros said successful exploitation could let an attacker extract data from the server database through a read-only SQL injection. The issue is tracked in WebPros security advisory **AV26-790** and was responsibly disclosed by Aziz Knani. WebPros released fixes in **Plesk Obsidian** versions `18.0.80.1` and `18.0.79.5` and urged administrators to apply the latest hotfix build immediately. As temporary mitigations, the company advised restricting reseller system logins and reseller API access until patching is complete. The advisory was also circulated through the Canadian Centre for Cyber Security, underscoring the need for prompt remediation across exposed hosting environments.
Aug 10, 2026
WebPros Plesk before version **18.0.80.1** is affected by **CVE-2026-64637**, an improper privilege management flaw in the **XML-RPC API** that allows an authenticated reseller to obtain an administrative session for the **root** user account. The vulnerability is classified as **CWE-269** and carries a high-severity **CVSS v3** vector of `AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`, indicating low attack complexity and potentially severe impact on confidentiality, integrity, and availability. A related advisory from **CERT-PY** flagged the issue in Plesk products, reinforcing the risk to organizations that use the hosting control panel in multi-tenant or reseller environments. Available records indicate the flaw is not currently assessed as exploited in the wild and is not considered automatable, but its ability to let a lower-privileged authenticated user escalate directly to root-level administration makes prompt upgrading to **18.0.80.1** or later a priority.
Aug 8, 2026
Plesk disclosed and patched **CVE-2026-44962**, a critical privilege-escalation flaw in **Plesk on Linux** that allows a low-privileged authenticated user to execute arbitrary operating system commands on affected servers. The bug stems from an **XPath injection** issue in the **APS Application Catalog** search function, where unsanitized input is inserted into XPath queries, enabling remote exploitation without user interaction. The vulnerability carries a **CVSS 10.0** rating and can lead to administrative access and full compromise of server resources, with particular risk for shared hosting and other multi-tenant deployments. Plesk released fixes in versions **18.0.76.2** and **18.0.75.1**, and advised administrators to update immediately. For systems that cannot yet be patched, the company said the **APS subsystem** should be disabled through the `panel.ini` configuration file and management components restarted. The flaw was responsibly disclosed by **Georgii Shutiaev**, and reports said there was no public evidence of active exploitation at the time of publication, though defenders were urged to review access controls and monitor for suspicious command execution.
Jun 29, 2026