EUVD-2026-66875
GHSA-6883-v78q-c9cg
Severity by source
AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
PR:H reflects mandatory main-site admin credentials; AC:L because exploitation is straightforward once that role is held; no integrity or availability impact.
Primary rating from Vendor (wpscan).
CVSS VectorVendor: wpscan
Lifecycle Timeline
4DescriptionCVE.org
The JetBackup WordPress plugin before 3.1.23.5 does not perform its multisite authorisation check before serving backup archives and job logs, allowing an administrator of the network's main site who is not a Super Admin to download a full backup of the entire network, including every site's data and the shared webroot.
AnalysisAI
Incorrect authorization in the JetBackup WordPress plugin (versions before 3.1.23.5) exposes full network backup archives and job logs to insufficiently privileged administrators on WordPress multisite installations. A main-site administrator who has not been granted Super Admin status can exploit the missing multisite authorization gate to download a complete backup of the entire network - encompassing every subsite's database, files, and the shared webroot. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires three concurrent conditions: (1) the target WordPress installation must be running in multisite (network) mode - single-site deployments are unaffected; (2) the JetBackup plugin must be installed and at a version between 3.1.18.8 and below 3.1.23.5; (3) the attacker must hold an active administrator account on the network's main site that has NOT been granted Super Admin privileges. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 3.1 vector (AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N, score 4.4) reflects a narrow attack surface: network-accessible but requiring high privileges and high complexity, with no integrity or availability 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: upgrade JetBackup to version 3.1.23.5 or later, which introduces the missing multisite Super Admin authorization check before serving backup archives and job logs. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-863 – Incorrect Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today