EUVD-2026-75596
GHSA-m444-4f6f-9m89
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Authenticated customer (PR:L) writes files as root over the network with low complexity; tenant-to-root escape is a scope change (S:C) with total C/I/A impact.
Primary rating from Vendor (hackerone).
CVSS VectorVendor: hackerone
Lifecycle Timeline
2DescriptionCVE.org
Path traversal in Plesk's Backup Manager causes arbitrary file write as root by an authenticated customer.
AnalysisAI
Arbitrary file write as root in Plesk's Backup Manager lets an authenticated customer escalate to full server compromise through a path traversal (CWE-36) in the handling of an unsigned backup header. Any low-privileged Plesk customer account can write files to attacker-chosen locations with root privileges, and because Plesk is a widely deployed hosting control panel, the flaw exposes shared and reseller hosting environments to tenant-to-root escalation. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated Plesk customer account (PR:L) with access to the Backup Manager feature; the attacker crafts a malicious backup header exploiting the fact that it is unsigned/unvalidated, so no signature or integrity check blocks the traversal. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The supplied CVSS 3.0 vector (AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H, base 9.9) reflects a genuinely severe issue: network-reachable, low attack complexity, only low privileges (a normal customer account, which is the expected trust boundary in multi-tenant hosting), no user interaction, and a scope change because a customer breaks out to root/system control with full C/I/A impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Patch available per vendor advisory - apply the fixed Plesk build referenced in the WebPros support article (https://support.plesk.com/hc/en-us/articles/43248841638551-Vulnerability-in-Plesk-s-Backup-Manager-unsigned-backup-header-allows-path-traversal); the exact fixed version is not stated in the available data, so confirm the target build against that advisory and enable Plesk automatic updates. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, contact Plesk support to confirm your deployment is affected and obtain detailed mitigation guidance; immediately restrict Backup Manager access for all customer accounts to those operationally requiring it, and audit recent backup operations for suspicious file-write activity. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Plesk Obsidian allows a CSRF attack, e.g., via the /api/v2/cli/commands REST API to change an Admin password. Rated medi
A Host Header Injection issue on the Login page of Plesk Obsidian through 18.0.49 allows attackers to redirect users to
The feature to preview a website in Plesk Obsidian 18.0.0 through 18.0.32 on Linux is vulnerable to reflected XSS via th
Cross-tenant credential disclosure in WebPros Plesk before 18.0.78.4 allows a low-privileged authenticated customer to e
SQL injection in the Plesk hosting control panel's XML-RPC API allows a remote, low-privileged authenticated user to inj
Authenticated remote attackers against WebPros Plesk (versions before 18.0.79.8, and 18.0.80 through 18.0.80.3) can inje
Local privilege escalation to root affects the Backup Manager component of WebPros Plesk, where a time-of-check-to-time-
Privilege escalation in the Plesk web hosting control panel lets an authenticated low-privileged user abuse an improper
Privilege escalation to remote code execution in Plesk (18.0.52 through 18.0.79.6, and the 18.0.80.0 branch before 18.0.
Privilege escalation to root in Plesk for Linux (18.0.34 up to 18.0.79.9 / 18.0.80.5) lets a customer- or reseller-level
Plesk 17.0 through 18.0.31 version, is vulnerable to a Cross-Site Scripting. Rated critical severity (CVSS 9.0), this vu
Cross-tenant insecure direct object reference in Plesk's database management interface allows any authenticated hosting
Same weakness CWE-36 – Absolute Path Traversal
View allSame technique Path Traversal
View allShare
External POC / Exploit Code
Leaving vuln.today