EUVD-2026-53879
GHSA-xqx7-fh5p-977f
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Unauthenticated network-reachable deserialization sink (AV:N/AC:L/PR:N/UI:N) that, with a viable POP chain, yields full C/I/A compromise; scope unchanged as impact stays on the host.
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 AI ANN <= 1.29.0 versions.
AnalysisAI
PHP Object Injection in the AI ANN WordPress theme (by AxiomThemes) affects all versions up to and including 1.29.0, allowing unauthenticated remote attackers to inject crafted serialized PHP objects that are deserialized by the theme. When a suitable POP (property-oriented programming) gadget chain is present in the theme, WordPress core, or an active plugin, this can escalate to remote code execution, arbitrary file operations, or data compromise. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the AI ANN theme (version ≤1.29.0) be installed and active, and that a request reach the theme code path passing attacker-controlled data to a PHP deserialization sink; per the CVSS vector (PR:N/UI:N) no authentication or user interaction is needed against a default install. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are only partially aligned. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker sends a crafted HTTP request to a public AI ANN endpoint, embedding a serialized PHP object payload in a parameter that the theme passes to unserialize(). If a viable gadget chain is present in the theme, WordPress, or an active plugin, deserialization triggers magic methods that lead to code execution or file manipulation on the server - all without authentication or user interaction. … |
| Remediation | No vendor-released patched version is identified at time of analysis, so a fixed release could not be confirmed from the available data - monitor the Patchstack advisory (https://patchstack.com/database/wordpress/theme/ann/vulnerability/wordpress-ai-ann-theme-1-29-0-php-object-injection-vulnerability) and the AxiomThemes vendor channel for an update beyond 1.29.0 and apply it immediately once released. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all WordPress installations using AI ANN theme versions ≤1.29.0 and immediately disable the theme or take sites offline; simultaneously deploy WAF rules to block malicious serialized PHP object payloads targeting the vulnerability. …
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External POC / Exploit Code
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