CVE-2026-16502: CWE-502 Deserialization of Untrusted Data in livecomposer Live Composer – Free WordPress Website Builder
The Live Composer – Free WordPress Website Builder plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 2.1.18 via deserialization of untrusted input . This makes it possible for authenticated attackers, with contributor-level access and above, 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-2026-16502 is a PHP Object Injection vulnerability in the Live Composer WordPress plugin affecting all versions up to 2.1.18. It arises from unsafe deserialization of untrusted input, allowing authenticated contributors or higher to inject PHP objects. However, no gadget chain is present in the plugin itself, so exploitation requires another plugin or theme with a POP chain to trigger impactful actions such as file deletion, data disclosure, or code execution.
Potential Impact
If a POP chain is present in other installed plugins or themes, an attacker with contributor-level access can leverage this vulnerability to delete arbitrary files, retrieve sensitive information, or execute arbitrary code. Without such a POP chain, the vulnerability has no direct impact.
Mitigation Recommendations
No official fix or patch is currently available. Users should monitor vendor advisories for updates. Mitigation involves removing or updating any plugins or themes that provide a POP chain to reduce exploitation risk. Restricting contributor-level access and above to trusted users can also reduce risk.
CVE-2026-16502: CWE-502 Deserialization of Untrusted Data in livecomposer Live Composer – Free WordPress Website Builder
Description
The Live Composer – Free WordPress Website Builder plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 2.1.18 via deserialization of untrusted input . This makes it possible for authenticated attackers, with contributor-level access and above, 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.
CVSS v3.1
Score 8.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16502 is a PHP Object Injection vulnerability in the Live Composer WordPress plugin affecting all versions up to 2.1.18. It arises from unsafe deserialization of untrusted input, allowing authenticated contributors or higher to inject PHP objects. However, no gadget chain is present in the plugin itself, so exploitation requires another plugin or theme with a POP chain to trigger impactful actions such as file deletion, data disclosure, or code execution.
Potential Impact
If a POP chain is present in other installed plugins or themes, an attacker with contributor-level access can leverage this vulnerability to delete arbitrary files, retrieve sensitive information, or execute arbitrary code. Without such a POP chain, the vulnerability has no direct impact.
Mitigation Recommendations
No official fix or patch is currently available. Users should monitor vendor advisories for updates. Mitigation involves removing or updating any plugins or themes that provide a POP chain to reduce exploitation risk. Restricting contributor-level access and above to trusted users can also reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-07-21T18:48:52.754Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a9ff394acd9273b49949e22
Added to database: 09/08/2026, 11:37:56 UTC
Last enriched: 09/08/2026, 11:53:13 UTC
Last updated: 09/09/2026, 01:15:30 UTC
Views: 12
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