Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
PR:L reflects mandatory low-privilege account; AC:L reflects that WordPress multi-plugin environments routinely supply viable POP gadget chains.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
Lifecycle Timeline
2DescriptionCVE.org
Customer PHP Object Injection in Essential Real Estate <= 5.3.3 versions.
AnalysisAI
PHP Object Injection in the Essential Real Estate WordPress plugin (≤ 5.3.3) by g5theme allows low-privileged authenticated users to pass a crafted serialized PHP object through a vulnerable unserialize() call, potentially triggering arbitrary code execution if a usable POP (Property-Oriented Programming) gadget chain exists within the WordPress installation. The CVSS 8.8 score reflects full confidentiality, integrity, and availability impact - realistic in WordPress environments where co-installed plugins routinely supply gadget chains. No public exploit code or active exploitation (CISA KEV) has been identified at the time of analysis.
Technical ContextAI
CWE-502 (Deserialization of Untrusted Data) covers flaws where attacker-controlled input reaches PHP's native unserialize() function without sanitization. PHP's object model allows magic methods (__wakeup, __destruct, __toString, __get, etc.) to execute automatically upon deserialization, enabling an attacker-crafted object to chain method calls across the class hierarchy - a POP chain - ultimately achieving arbitrary file writes, deletion, or remote code execution. The affected product is the Essential Real Estate plugin by g5theme (CPE: cpe:2.3:a:g5theme:essential_real_estate:*:*:*:*:*:*:*:*) for WordPress, all versions through 5.3.3. WordPress's plugin architecture means that gadget chain candidates frequently exist across the broader plugin ecosystem installed alongside the vulnerable component, compounding the exploitability.
RemediationAI
Update the Essential Real Estate plugin to the latest version available in the WordPress plugin repository, which should contain the fix for this deserialization flaw - the exact patched release version was not confirmed in the available reference data, so verify the current version against the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/essential-real-estate/vulnerability/wordpress-essential-real-estate-plugin-5-3-3-php-object-injection-vulnerability before deploying. If an immediate update is not possible, disable user registration on the WordPress site to remove the low-privilege account attack surface; note this will block legitimate subscriber sign-ups as a trade-off. As a secondary compensating control, deploy a WAF rule targeting serialized PHP object patterns (e.g., 'O:[0-9]+:') in request bodies and query strings, though this may produce false positives on legitimate serialized data used elsewhere. Restricting network access to the WordPress admin and plugin endpoints to trusted IP ranges reduces exposure but does not eliminate it if the vulnerable endpoint is accessible to registered users.
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Same weakness CWE-502 – Deserialization of Untrusted Data
View allSame technique Deserialization
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-60901
GHSA-667w-p3xr-xc83