CVE-2026-110039: CWE-863 Incorrect Authorization in Smush
Description
The Smush WordPress plugin before 4.3.4 does not restrict changes to a network-wide access setting to network administrators, allowing an administrator of a single site on a multisite network to change it for the entire network.
CVSS v3.1
Score 2.7low
Affected software
Smush
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-110039 describes an incorrect authorization vulnerability (CWE-863) in the Smush WordPress plugin prior to version 4.3.4. The flaw permits an administrator of a single site within a multisite WordPress network to change a network-wide access setting, a privilege that should be limited to network administrators. This could lead to unauthorized configuration changes affecting the entire multisite network.
Potential Impact
An attacker with administrator privileges on a single site in a multisite WordPress environment can escalate their control by modifying network-wide settings. This could potentially disrupt or alter the configuration of the entire multisite network, impacting all sites under that network.
Mitigation Recommendations
Upgrade the Smush plugin to version 4.3.4 or later, where this authorization issue has been fixed. No other mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-10-13T15:37:19.361Z
- State
- PUBLISHED
Threat ID: 6ad1c55c2cdf04f656c2cfe5
Added to database: 10/16/2026, 06:34:04 UTC
Last enriched: 10/16/2026, 06:48:44 UTC
Last updated: 10/16/2026, 19:03:29 UTC
Views: 16
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