What is the CVSS score of EUVD-2026-37483?

EUVD-2026-37483 has a CVSS 3.1 base score of 8.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.3%.

Which versions of Valiance WordPress Theme are affected by EUVD-2026-37483?

The Valiance WordPress theme (versions 1.2 and earlier) contains a critical PHP object injection flaw (CVSS 8.1) with remote code execution potential and no currently available patch.

How to fix or mitigate EUVD-2026-37483?

24 HOURS: Audit all WordPress installations to identify those running Valiance theme ≤1.2; disable the theme or restrict internet-facing access until patch availability is confirmed. 7 DAYS: Implement Web Application Firewall rules to block PHP serialized object patterns in user input; review and restrict administrative account privileges to principle of least privilege; subscribe to Valiance security advisories for patch announcements. 30 DAYS: Establish automated monitoring for Valiance updates; prepare migration plan to alternative WordPress theme if remediation timeline extends beyond acceptable risk window; assess whether custom plugins deployed in affected environments could serve as exploitation gadgets.

Valiance WordPress Theme EUVD-2026-37483

| CVE-2026-39578 HIGH

Deserialization of Untrusted Data (CWE-502)

2026-06-16 Patchstack

PHP Deserialization Valiance

8.1

CVSS 3.1 · Vendor: Patchstack

Severity by source

Vendor (Patchstack) PRIMARY

8.1 HIGH

AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

vuln.today AI

10.0 CRITICAL

Patchstack labels it unauthenticated (PR:N), network-reachable with no user interaction; PHP object injection typically chains to RCE via gadget chains, so C/I/A:H with scope change.

3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Jun 16, 2026 - 23:34 vuln.today

DescriptionCVE.org

Unauthenticated PHP Object Injection in Valiance <= 1.2 versions.

AnalysisAI

PHP Object Injection in the Valiance WordPress theme (versions up to and including 1.2) by elated-themes allows attackers to pass attacker-controlled serialized data into a PHP unserialize() sink, enabling object injection that - when paired with a suitable gadget chain from WordPress core or another installed plugin - can lead to remote code execution, file manipulation, or data tampering. The Patchstack advisory labels the issue as unauthenticated, although the published CVSS vector lists PR:H, so the precise authentication boundary should be verified against the vendor advisory. There is no public exploit identified at time of analysis and the flaw is not listed in CISA KEV.

Technical ContextAI

Valiance is a commercial multipurpose WordPress theme distributed by elated-themes (CPE cpe:2.3:a:elated-themes:valiance). The root cause class is CWE-502, Deserialization of Untrusted Data: PHP's unserialize() reconstructs arbitrary objects and invokes their magic methods (__wakeup, __destruct, __toString), so any reachable unserialize() call against attacker-influenced input becomes a gadget-chain trigger. In the WordPress ecosystem, object injection is commonly weaponized through POP chains in core, WooCommerce, or other plugins (e.g., Requests, Guzzle, Monolog) loaded into the same request, which is why even a 'low' direct impact can escalate to RCE in real deployments.

RemediationAI

No vendor-released patch identified at time of analysis - the Patchstack advisory does not cite a fixed Valiance version in the supplied data, so administrators should monitor the elated-themes changelog and the Patchstack record (https://patchstack.com/database/wordpress/theme/valiance/vulnerability/wordpress-valiance-theme-1-2-php-object-injection-vulnerability) and upgrade as soon as a patched build is published. Until a fix exists, deploy the Patchstack mTrac/vPatch virtual patch or an equivalent WAF rule that blocks requests containing serialized PHP payloads (e.g., parameter values matching /^(O|a|s|C):\d+:/) against theme endpoints; restrict access to admin-ajax.php and theme-handled URLs to authenticated users via web-server ACLs if feasible, accepting the trade-off that this may break legitimate front-end AJAX features that Valiance uses for sliders, contact forms, or portfolio loaders. As a last resort, switch the site to a different theme until elated-themes ships a remediation.