Threat intelligence

OptionTree <= 2.7.3 - Authenticated (Editor+) PHP Object Injection

CVE-2026-66620 · option-tree

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Option Tree at a vulnerable version. How SiteRespond intelligence works

Vulnerability: OptionTree <= 2.7.3 - Authenticated (Editor+) PHP Object Injection
Affected software: option-tree(Plugin)
Affected versions: ≤ 2.7.3
Authentication: Authenticated (see advisory title)
Vulnerability type: Other
CVE: CVE-2026-66620
Published: 18 August 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: This advisory describes a other issue in the affected software. Review the source advisory and your installed version to assess exposure.
Source: Data imported from Wordfence Intelligence (advisory 87c7ea55-f1ac-411e-9b27-650461f74afb). Methodology and redistribution notes

Check whether your installed version is affected

SiteRespond Defence matches your installed Option Tree version against this catalog when the Defence plugin is connected to your WordPress site.

Start SiteRespond Defence for WordPress — £29.99/monthScan your website

All Option Tree advisoriesBack to catalog