CVE-2026-7637: CWE-502 Deserialization of Untrusted Data in PixelYourSite Boost
The Boost plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 2.0.3 via deserialization of untrusted input in the STYXKEY-BOOST_USER_LOCATION cookie. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
AI Analysis
Technical Summary
CVE-2026-7637 is a critical PHP Object Injection vulnerability in the PixelYourSite Boost WordPress plugin (≤ 2.0.3) caused by unsafe deserialization of the STYXKEY-BOOST_USER_LOCATION cookie. The vulnerability allows unauthenticated attackers to inject PHP objects. Exploitation depends on the presence of a POP chain gadget in other installed plugins or themes, which could enable arbitrary file deletion, data disclosure, or code execution. No patch or official fix has been published, and the plugin is not a cloud service, so remediation depends on vendor updates or mitigations by site administrators.
Potential Impact
If exploited in an environment where a suitable POP chain exists, this vulnerability can lead to high-impact consequences including complete compromise of the affected WordPress site through arbitrary code execution, data theft, or file deletion. Without a POP chain, the vulnerability cannot be exploited and thus has no impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is released, site administrators should consider removing or disabling the PixelYourSite Boost plugin or ensure that no other installed plugins or themes provide a POP chain that could be leveraged. Monitoring vendor channels for updates is recommended.
CVE-2026-7637: CWE-502 Deserialization of Untrusted Data in PixelYourSite Boost
Description
The Boost plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 2.0.3 via deserialization of untrusted input in the STYXKEY-BOOST_USER_LOCATION cookie. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-7637 is a critical PHP Object Injection vulnerability in the PixelYourSite Boost WordPress plugin (≤ 2.0.3) caused by unsafe deserialization of the STYXKEY-BOOST_USER_LOCATION cookie. The vulnerability allows unauthenticated attackers to inject PHP objects. Exploitation depends on the presence of a POP chain gadget in other installed plugins or themes, which could enable arbitrary file deletion, data disclosure, or code execution. No patch or official fix has been published, and the plugin is not a cloud service, so remediation depends on vendor updates or mitigations by site administrators.
Potential Impact
If exploited in an environment where a suitable POP chain exists, this vulnerability can lead to high-impact consequences including complete compromise of the affected WordPress site through arbitrary code execution, data theft, or file deletion. Without a POP chain, the vulnerability cannot be exploited and thus has no impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is released, site administrators should consider removing or disabling the PixelYourSite Boost plugin or ensure that no other installed plugins or themes provide a POP chain that could be leveraged. Monitoring vendor channels for updates is recommended.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-05-01T15:30:51.110Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a0d2b91ba1db473622b5107
Added to database: 5/20/2026, 3:33:37 AM
Last enriched: 5/20/2026, 3:48:40 AM
Last updated: 5/20/2026, 7:57:32 PM
Views: 14
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