EUVD-2026-53942
GHSA-fggq-3fv5-w95m
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Unauthenticated network deserialization sink (PR:N/UI:N/AV:N/AC:L); assuming a reachable gadget chain yields full RCE-level C/I/A:H, consistent with the reported vector.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Unauthenticated PHP Object Injection in Ajax Search Lite <= 4.14.4 versions.
Articles & Coverage 1
AnalysisAI
PHP Object Injection in the Ajax Search Lite WordPress plugin (versions ≤ 4.14.4) lets unauthenticated remote attackers pass attacker-controlled serialized data into a PHP unserialize() call, enabling object instantiation that - when paired with a suitable gadget chain in the plugin or wider WordPress runtime - can lead to remote code execution, data theft, or site takeover. Reported by Patchstack and tracked as EUVD-2026-53942, it carries a CVSS of 9.8 (fully unauthenticated network vector). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The prerequisite is that a request reaches the Ajax Search Lite deserialization sink on a site running plugin version ≤ 4.14.4; per the CVSS vector (AV:N/AC:L/PR:N/UI:N) no authentication, no user interaction, and no special non-default configuration are required - an attacker only needs network access to a WordPress site with the plugin active. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H reflects a high-severity, low-complexity, fully unauthenticated network attack with high confidentiality, integrity, and availability impact - a strong prioritization signal. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An unauthenticated attacker crafts an HTTP request to the plugin's search/AJAX endpoint containing a malicious serialized PHP object and submits it directly, no login or user interaction required. When the plugin calls unserialize() on that input, the forged object triggers a gadget chain in WordPress or a loaded plugin, letting the attacker read data, write files, or execute code. … |
| Remediation | No vendor-released patch version is identified at time of analysis in the provided data, so consult the Patchstack advisory (https://patchstack.com/database/wordpress/plugin/ajax-search-lite/vulnerability/wordpress-ajax-search-lite-plugin-4-14-4-php-object-injection-vulnerability) for the fixed release and upgrade to a version above 4.14.4 as soon as it is available. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all WordPress instances running Ajax Search Lite plugin version 4.14.4 or earlier and deactivate the plugin across all environments immediately. …
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Same weakness CWE-502 – Deserialization of Untrusted Data
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External POC / Exploit Code
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