EUVD-2026-66763
GHSA-cxvf-wcrg-rcp2
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Cross-tenant IDOR crosses authorization boundaries between customer accounts (S:C); PR:L reflects required Plesk customer authentication; no availability impact.
Primary rating from Vendor (hackerone).
CVSS VectorVendor: hackerone
Lifecycle Timeline
3DescriptionCVE.org
Insecure direct object reference in Plesk 18.0.79.7 and earlier or 18.0.80 through 18.0.80.3, allows remote authenticated users to read and modify other customers' databases.
AnalysisAI
Cross-tenant insecure direct object reference in Plesk's database management interface allows any authenticated hosting panel customer to read and overwrite databases belonging to other customers on the same server, affecting versions 18.0.79.7 and earlier and 18.0.80 through 18.0.80.3. The CVSS 4.0 score of 8.6 reflects high confidentiality and integrity impact with low attack complexity, consistent with the description: a valid tenant account and knowledge of another tenant's database identifier are all that is required. …
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 | Exploitation requires a valid Plesk customer account on the targeted server - any standard tenant account with access to the database management interface is sufficient, with no elevated role or administrative privilege needed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N) is internally consistent with the vulnerability description: network-accessible, low complexity, requiring only a standard customer account, yielding high confidentiality and integrity impact with no availability or subsequent-system component. … 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 | Consult the Plesk vendor advisory at https://support.plesk.com/hc/en-us/articles/42844242102679-Vulnerability-CVE-2026-65642-in-Plesk-s-database-management-interface for the specific patched version and upgrade path, as no exact fix version number was confirmed in the available intelligence data - the advisory must be reviewed directly before deploying any update. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: identify all servers running Plesk 18.0.79.7 or earlier and versions 18.0.80 through 18.0.80.3, enumerate customer databases to assess exposure scope, and audit access logs for unauthorized cross-tenant database access. …
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
Arbitrary file write as root in Plesk's Backup Manager lets an authenticated customer escalate to full server compromise
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
Same technique Authentication Bypass
View allVendor StatusVendor
Share
External POC / Exploit Code
Leaving vuln.today