CVE-2026-12583: CWE-502 Deserialization of Untrusted Data in Newsletters
The Newsletters WordPress plugin before version 4.15 contains a deserialization vulnerability that allows unauthenticated attackers to inject malicious PHP objects via a public form. This can lead to arbitrary file writes and remote code execution on the server.
AI Analysis
Technical Summary
CVE-2026-12583 is a deserialization of untrusted data vulnerability (CWE-502) in the Newsletters WordPress plugin versions prior to 4.15. The plugin does not properly validate or restrict deserialization of input stored through a public form, enabling unauthenticated attackers to inject crafted PHP objects. Using a property-oriented gadget chain bundled with the plugin, attackers can write arbitrary files and execute code on the server, compromising the affected system.
Potential Impact
Successful exploitation allows unauthenticated attackers to achieve remote code execution on the server hosting the vulnerable Newsletters plugin. This can lead to full system compromise, data theft, or further malicious activity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch information is currently available. Until a patch is released, restrict access to the vulnerable plugin or disable it if possible to prevent exploitation.
CVE-2026-12583: CWE-502 Deserialization of Untrusted Data in Newsletters
Description
The Newsletters WordPress plugin before version 4.15 contains a deserialization vulnerability that allows unauthenticated attackers to inject malicious PHP objects via a public form. This can lead to arbitrary file writes and remote code execution on the server.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12583 is a deserialization of untrusted data vulnerability (CWE-502) in the Newsletters WordPress plugin versions prior to 4.15. The plugin does not properly validate or restrict deserialization of input stored through a public form, enabling unauthenticated attackers to inject crafted PHP objects. Using a property-oriented gadget chain bundled with the plugin, attackers can write arbitrary files and execute code on the server, compromising the affected system.
Potential Impact
Successful exploitation allows unauthenticated attackers to achieve remote code execution on the server hosting the vulnerable Newsletters plugin. This can lead to full system compromise, data theft, or further malicious activity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch information is currently available. Until a patch is released, restrict access to the vulnerable plugin or disable it if possible to prevent exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-06-18T07:06:08.362Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a55d15368715ace43daafbc
Added to database: 07/14/2026, 06:04:03 UTC
Last enriched: 07/14/2026, 06:17:48 UTC
Last updated: 07/14/2026, 07:01:47 UTC
Views: 6
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