CVE-2026-68487
Received Received - Intake

Path Traversal in Plesk Backup Manager Allows Root File Write

Publication date: 2026-09-10

Last updated on: 2026-09-10

Assigner: HackerOne

Description
Path traversal in Plesk's Backup Manager causes arbitrary file write as root by an authenticated customer.

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Meta Information

Published
2026-09-10
Last Modified
2026-09-10
Generated
2026-09-10
AI Q&A
2026-09-10
EPSS Evaluated
N/A
NVD
CVE-2026-68487
EUVD
EUVD-2026-75596

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
plesk backup_manager to 18.0.80.7 (exc)
plesk backup_manager to 18.0.79.11 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-36 The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize absolute path sequences such as "/abs/path" that can resolve to a location that is outside of that directory.

Attack-Flow Graph

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Executive Summary

CVE-2026-68487 is a path traversal vulnerability in Plesk's Backup Manager. An authenticated customer can exploit this to write arbitrary files as the root user on the host filesystem, potentially leading to full server compromise.

Detection Guidance

Check Plesk version using 'plesk version' command. If running 18.0.80.6 or earlier or 18.0.79.10 or earlier, the system is vulnerable. Inspect Backup Manager logs for unusual file paths or unauthorized file writes.

Impact Analysis

This vulnerability allows an attacker with authenticated access to write malicious files as root. This could result in complete system takeover, data theft, or disruption of services hosted on the server.

Mitigation Strategies

Update Plesk Obsidian to version 18.0.79.11 or 18.0.80.7 or later immediately. Ensure all authenticated customers are verified and restrict access to Backup Manager until patched.

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