What is the CVSS score of CVE-2026-40751?

CVE-2026-40751 has a CVSS 3.1 base score of 8.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.3%.

Which versions of Ashtanga WordPress Theme are affected by CVE-2026-40751?

The Ashtanga WordPress theme (version 1.2 and earlier) contains an unauthenticated PHP object injection vulnerability enabling remote code execution and complete website compromise.

How to fix or mitigate CVE-2026-40751?

24 hours: Conduct inventory of all WordPress installations using Ashtanga theme version 1.2 or earlier; isolate identified systems from public-facing traffic. 7 days: Either upgrade to a confirmed patched version from Mikado-Themes (if available) or deactivate and replace the theme entirely. Deploy Web Application Firewall rules blocking PHP serialization payloads to the affected application paths. 30 days: Establish quarterly vulnerability assessment process for all third-party WordPress themes; subscribe to Mikado-Themes security advisories.

Ashtanga WordPress Theme CVE-2026-40751

EUVD-2026-37487 HIGH

Deserialization of Untrusted Data (CWE-502)

2026-06-16 Patchstack

PHP Deserialization Ashtanga

8.1

CVSS 3.1 · Vendor: Patchstack

Severity by source

Vendor (Patchstack) PRIMARY

8.1 HIGH

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

vuln.today AI

8.1 HIGH

Network-reachable and unauthenticated (AV:N/PR:N/UI:N); AC:H because successful RCE depends on a reachable POP gadget chain in the target's plugin/theme stack; full C/I/A impact once chained.

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

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Jun 16, 2026 - 23:32 vuln.today

DescriptionCVE.org

Unauthenticated PHP Object Injection in Ashtanga <= 1.2 versions.

AnalysisAI

Unauthenticated PHP Object Injection in the Mikado-Themes Ashtanga WordPress theme (versions ≤ 1.2) allows remote attackers to deliver malicious serialized PHP objects to the application. When combined with a suitable POP (property-oriented programming) gadget chain present in WordPress core, other plugins, or themes, exploitation can lead to remote code execution, arbitrary file operations, or full site compromise. No public exploit identified at time of analysis, and the issue is not listed in CISA KEV.

Technical ContextAI

The vulnerability is a CWE-502 (Deserialization of Untrusted Data) flaw in a commercial WordPress theme sold by Mikado-Themes, identified by CPE cpe:2.3:a:mikado-themes:ashtanga. PHP Object Injection occurs when user-controlled input reaches PHP's unserialize() function (or equivalent), allowing an attacker to instantiate arbitrary classes already loaded in the runtime. In the WordPress ecosystem this is particularly dangerous because the broad surface of loaded plugin and core classes frequently contains 'magic method' gadgets (__wakeup, __destruct, __toString) that can be chained - via tools like PHPGGC - into file writes, SQL queries, or code execution, even when the vulnerable component itself contains no obviously dangerous sink.

RemediationAI

No vendor-released patch identified at time of analysis in the provided data - administrators should monitor Mikado-Themes and the Patchstack advisory at https://patchstack.com/database/wordpress/theme/ashtanga/vulnerability/wordpress-ashtanga-theme-1-2-php-object-injection-vulnerability for a fixed release beyond 1.2 and upgrade as soon as it is published. Until a patched version is available, deploy a WordPress WAF such as Patchstack or Wordfence with virtual-patching rules for PHP object injection (which will block requests containing serialized object payloads, at the cost of occasionally false-positiving on legitimate serialized data), restrict access to theme endpoints via web-server ACLs or HTTP auth where feasible, and consider deactivating the Ashtanga theme and switching to a default theme on high-value sites (this is the only fully effective mitigation but obviously breaks the site's appearance). Also audit installed plugins and remove any unused ones to shrink the available gadget-chain surface.