EUVD-2026-53993
GHSA-hccw-55hg-mfxv
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Unauthenticated network-reachable deserialization (AV:N/AC:L/PR:N/UI:N) with potential RCE gives high C/I/A; scope unchanged as impact stays within the WordPress application.
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 Accalia <= 1.5.3 versions.
AnalysisAI
Unauthenticated PHP Object Injection in the Accalia WordPress theme (by AncoraThemes) affects all versions up to and including 1.5.3, allowing remote attackers to inject crafted serialized PHP objects that are deserialized by the application. When a suitable POP (property-oriented programming) gadget chain is present in the theme, its plugins, or WordPress core, this can lead to remote code execution, data disclosure, or site takeover. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the target site to run the Accalia theme at version 1.5.3 or earlier and to expose the request path that reaches the vulnerable unserialize() call; 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 | The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H = 9.8 Critical) indicates network-reachable, low-complexity, unauthenticated exploitation with high impact to confidentiality, integrity, and availability, which places it at the top of the priority scale on paper. … 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 Accalia-powered WordPress site, embedding a serialized PHP object in a parameter that the theme passes to unserialize(). If a gadget chain exists in the theme, an active plugin, or WordPress core, the deserialization triggers magic methods that lead to arbitrary file writes or code execution, giving the attacker control of the site - all without authentication or user interaction (AV:N/AC:L/PR:N/UI:N). … |
| Remediation | No vendor-released patched version is identified in the available data, so the fixed release could not be independently confirmed; consult the Patchstack advisory (https://patchstack.com/database/wordpress/theme/accalia/vulnerability/wordpress-accalia-theme-1-5-3-php-object-injection-vulnerability) and the AncoraThemes vendor page for an update beyond 1.5.3 and apply it as the primary fix once available. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: inventory all WordPress installations for Accalia theme presence and version; immediately deactivate the theme and deploy a replacement (use WordPress default themes or vetted alternatives as interim solution). …
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Same weakness CWE-502 – Deserialization of Untrusted Data
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External POC / Exploit Code
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