PHP object injection via import deserialization
Published Aug 18, 2026 · Updated Aug 18, 2026
PHP object injection in Derek Herman OptionTree 2.7.3 and earlier allows remote authenticated users to execute code via crafted import data. The ot_import admin handler passes base64-decoded import_settings, import_data, and import_layouts POST values to ot_decode, which relies on a regex object check before calling maybe_unserialize on attacker-controlled serialized content. Reachability is limited to users who can access the plugin's import workflow, which Patchstack characterizes as Editor-level, and code execution requires a usable PHP object POP chain in the WordPress stack.
Summary
What happened
PHP object injection in Derek Herman OptionTree 2.7.3 and earlier allows remote authenticated users to execute code via crafted import data. The ot_import admin handler passes base64-decoded import_settings, import_data, and import_layouts POST values to ot_decode, which relies on a regex object check before calling maybe_unserialize on attacker-controlled serialized content. Reachability is limited to users who can access the plugin's import workflow, which Patchstack characterizes as Editor-level, and code execution requires a usable PHP object POP chain in the WordPress stack.
The record
- CVE
- CVE-2026-66620
- Published
- Aug 18, 2026
- Updated
- Aug 18, 2026
- Vendor
- Derek Herman
- Product
- OptionTree
- Classifications
- CWE-502
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 18, 2026CVE publishedPublication date reported by the CVE source.
- Aug 18, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=n/a <=2.7.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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