CVE-2026-25032: 
WordPress vulnerability analysis and mitigation

CVE-2026-25032 is a PHP Object Injection vulnerability (Deserialization of Untrusted Data) in the "Ricky" WordPress theme developed by park_of_ideas. It affects all versions of the Ricky theme prior to 2.31 and was published on March 25, 2026, with the vulnerability originally reported by researcher João Pedro S Alcântara (Kinorth) on January 8, 2026. The vulnerability carries a CVSS v3.1 base score of 9.8 (Critical), exploitable remotely without authentication or user interaction (Patchstack, Feedly).

The root cause is improper deserialization of untrusted user-supplied data (CWE-502), classified under OWASP Top 10 A3: Injection and mapped to CAPEC-586 (Object Injection). An unauthenticated remote attacker can supply a crafted serialized PHP object via a network request, which the theme deserializes without adequate validation, enabling object injection. If a suitable PHP Object Injection (POP) chain exists within the WordPress installation or its plugins, this can be leveraged to achieve code execution, SQL injection, path traversal, or denial of service (Patchstack).

Successful exploitation can result in full compromise of confidentiality, integrity, and availability of the affected WordPress installation. Depending on available POP chains in the environment, an attacker could execute arbitrary code, perform SQL injection, traverse the file system, or cause a denial of service — all without requiring any authentication or user interaction. The broad attack surface of WordPress sites running this theme makes mass-exploitation campaigns a realistic threat (Patchstack).

As of the time of reporting, there is no public proof-of-concept exploit and no confirmed evidence of in-the-wild exploitation. The EPSS score is approximately 0.024% (0.000240), indicating a currently low probability of exploitation in the near term. The vulnerability has not been added to the CISA Known Exploited Vulnerabilities (KEV) catalog. However, Patchstack rates it as high priority and notes that vulnerabilities of this class are frequently used in mass-exploit campaigns targeting WordPress sites (Patchstack, Feedly).

1. Reconnaissance: Identify WordPress sites using the Ricky theme (versions below 2.31) via passive fingerprinting tools (e.g., WPScan, Shodan) or by inspecting theme metadata in page source.
2. Identify injection point: Locate the vulnerable endpoint or parameter in the Ricky theme that accepts and deserializes user-supplied PHP data without sanitization.
3. Enumerate POP chains: Analyze the target WordPress installation and its active plugins/themes for usable PHP Object Injection (POP) chains that can be triggered upon deserialization.
4. Craft malicious payload: Construct a serialized PHP object payload targeting an identified POP chain to achieve the desired effect (e.g., remote code execution, file write, SQL injection).
5. Submit payload: Send the crafted serialized object to the vulnerable endpoint via an unauthenticated HTTP request.
6. Achieve objective: The server deserializes the malicious object, triggering the POP chain and executing the attacker's intended action (e.g., webshell upload, data exfiltration, or site defacement) (Patchstack).

• Network: Unusual or malformed HTTP requests to WordPress endpoints associated with the Ricky theme, particularly those containing serialized PHP data (e.g., O:<length>:"<classname>" patterns in request bodies or parameters).
• Logs: WordPress or web server access logs showing repeated unauthenticated POST requests to theme-related endpoints with large or encoded payloads; PHP error logs indicating deserialization errors or unexpected class instantiation.
• File System: Newly created or modified PHP files in the WordPress theme or uploads directory (potential webshells); unexpected changes to wp-config.php or other core files.
• Process: Unusual child processes spawned by the web server process (e.g., bash, curl, wget) indicating possible code execution via a POP chain (Patchstack).

The vendor has released a patched version: Ricky theme 2.31. All WordPress site operators running any version of the Ricky theme below 2.31 should update immediately via the WordPress admin dashboard or by downloading the latest version from the theme repository. Patchstack has also issued a virtual patch (mitigation rule) for Patchstack-protected sites to block exploitation attempts until the theme is updated. If an immediate update is not possible, site owners should consult their hosting provider or web developer for assistance (Patchstack).

Wordfence included CVE-2026-25032 in its weekly WordPress vulnerability report covering March 23–29, 2026, highlighting it among notable disclosures for that period (Wordfence). Patchstack, which coordinated the disclosure, emphasized the high-priority nature of the vulnerability and its potential for use in mass-exploit campaigns targeting WordPress sites. No significant broader media coverage or notable researcher commentary beyond these sources has been identified.