CVE-2026-105073

Executive Summary

CVE-2026-105073 is an unauthenticated information disclosure vulnerability affecting the Arraytics WP Event Solution WordPress plugin through version 4.1.25. The plugin fails to properly restrict access to sensitive system information, allowing any remote attacker to retrieve embedded sensitive data without authentication. Successful exploitation results in low-confidentiality impact but requires no privileges or user interaction, making it trivially exploitable against any site running the affected plugin version.

Technical Analysis

The vulnerability is classified as CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere. This weakness occurs when an application exposes system-generated or embedded sensitive information to actors who should not have access to it. In the context of WP Event Solution, the affected component fails to enforce authorization or access-control checks before returning data that embeds sensitive system information.

The NVD description confirms the mechanism as "Retrieve Embedded Sensitive Data," and the CVSS vector AV:N/AC:L/PR:N/UI:N indicates the attack is network-reachable, requires no special conditions, needs no authentication, and requires no user interaction. The confidentiality impact is rated Low (C:L), meaning the exposed information is limited in scope or sensitivity, while integrity and availability impacts are None.

The affected product is the WordPress plugin "WP Event Solution" by Arraytics, distributed as wp-event-solution. The exposure affects all versions from n/a (initial release) through 4.1.25. The plugin is installed in the standard WordPress plugin directory, making it remotely reachable over HTTP/HTTPS by default on any site where it is active.

The precise code path, endpoint, or parameter that returns the sensitive data is not specified in the available NVD description. The vulnerability class, however, is consistent with an endpoint that returns configuration, environment, or application-embedded data without verifying that the requester is authorized to view it. Because no public proof-of-concept exists, the exact request format cannot be confirmed from available data.

The distinction between CWE-497 and adjacent classes matters for defenders: this is not a memory-safety bug, not an injection flaw, and not an authentication bypass into privileged functionality. It is a data-exposure flaw, meaning the primary risk is reconnaissance and credential/secret harvesting rather than direct system compromise.

Exploitation Scenarios

No public proof-of-concept or exploit code is available for CVE-2026-105073. The following attack chain is inferred strictly from the vulnerability class (CWE-497 / information exposure) and the CVSS vector; no specific function names, endpoints, or parameters are asserted because the NVD description does not provide them.

1. Reconnaissance / target identification: An attacker enumerates internet-facing WordPress sites and fingerprints those running the wp-event-solution plugin. This can be done passively through HTTP response body signatures (asset paths under wp-content/plugins/wp-event-solution/) or via Shodan queries such as http.html:"wp-content/plugins/wp-event-solution". Because exposure is unauthenticated (PR:N) and requires no user interaction (UI:N), no credentials or victim engagement are needed.

2. Triggering the flaw class: The attacker requests the plugin endpoint that fails to enforce an authorization check and returns embedded sensitive data. At the vulnerability-class level, this is an access-control failure on a data-returning endpoint: the server processes the request and returns information the requester should not be permitted to obtain. The attacker does not need to craft a malformed payload — the disclosure occurs through a normal, well-formed request.

3. Payload/execution method: No payload injection is required. The "exploit" is the unauthorized retrieval of data via a legitimate request. This maps to MITRE ATT&CK T1592 (Gather Victim Host Information), reflecting that the primary tactical value is reconnaissance data collection rather than code execution.

4. Post-exploitation impact: With confidentiality impact limited to Low, the attacker obtains information such as configuration details, environment data, or other embedded sensitive values exposed by the plugin. This data can be used to refine further attacks — for example, identifying internal paths, service versions, or secrets — but does not by itself grant code execution, data modification, or denial of service. The value is primarily in enabling follow-on reconnaissance and targeting.

Because the endpoint, parameter, and exact data returned are not described in the NVD entry, defenders should treat any unauthorized data-returning behavior from the plugin as suspicious and validate against vendor guidance.

Impact Assessment

The CVSS 3.1 base score is 5.3 (Medium), derived from the vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N. The subscores confirm: network attack vector, low attack complexity, no privileges required, no user interaction, unchanged scope, low confidentiality impact, and no integrity or availability impact.

The blast radius is limited to data exposure: sites running WP Event Solution versions up to and including 4.1.25 are affected. For a WordPress site, exposed data of this class can include configuration or environment details that assist an attacker in mapping the environment, identifying components, or preparing subsequent targeted attacks. Enterprise impact depends on whether the exposed data includes credentials, API keys, or infrastructure identifiers — the NVD description does not specify what data is returned, so the practical risk ranges from low-value reconnaissance to potentially higher-value secret disclosure.

Because the vulnerability is unauthenticated and remotely triggerable, any internet-exposed WordPress instance with the plugin active is a candidate target. There is no CISA KEV listing, indicating no confirmed in-the-wild exploitation as of the data provided, and no public exploit code exists.

Detection Guidance

Sigma Rule

title: WP Event Solution Sensitive Information Disclosure Attempt
id: 7b1f2c94-3a5e-4c8a-9d2f-105073aabbcc
status: experimental
description: Detects HTTP requests attempting to access WP Event Solution endpoints known to disclose embedded sensitive data (CVE-2026-105073).
references:
  - https://nvd.nist.gov/vuln/detail/CVE-2026-105073
author: valtersit.com
date: 2026-01-01
logsource:
  category: webserver
detection:
  selection_uri:
    cs-uri-stem|contains:
      - '/wp-content/plugins/wp-event-solution/'
  selection_bad_status:
    sc-status:
      - 200
  condition: selection_uri and selection_bad_status
falsepositives:
  - Legitimate plugin asset loading by normal site visitors
level: low

YARA Rule

rule CVE_2026_105073_WP_Event_Solution_Info_Disclosure
{
    meta:
        author = "valtersit.com"
        description = "Detects WP Event Solution plugin references associated with CVE-2026-105073 information disclosure"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2026-105073"
        date = "2026-01-01"
    strings:
        $plugin_dir = "wp-content/plugins/wp-event-solution" ascii wide nocase
        $plugin_name = "wp-event-solution" ascii wide nocase
        $vendor = "Arraytics" ascii wide nocase
    condition:
        any of them
}

Suricata IDS Rule

alert http any any -> any any (msg:"CVE-2026-105073 WP Event Solution Sensitive Information Disclosure Attempt"; flow:established,to_server; http.uri; content:"/wp-content/plugins/wp-event-solution/"; nocase; http.method; content:"GET"; reference:cve,2026-105073; classtype:attempted-recon; sid:2026105073; rev:1;)

Elastic Detection

sequence by source.ip with maxspan=5s
  [network where network.protocol == "http" and url.path : "/wp-content/plugins/wp-event-solution/*" and http.request.method == "GET"]
  [network where network.protocol == "http" and http.response.status_code == 200 and url.path : "/wp-content/plugins/wp-event-solution/*"]

Splunk SPL Query

index=web sourcetype=access_combined
| search uri_path="*/wp-content/plugins/wp-event-solution/*"
| stats count min(_time) as first_seen max(_time) as last_seen values(status) as status_codes by src_ip, uri_path
| where status_codes=200
| sort - count

Wazuh OSSEC Rule

<group name="web,wordpress,cve-2026-105073,">
  <rule id="1050730" level="5">
    <if_sid>31100</if_sid>
    <id>^GET</id>
    <url>wp-content/plugins/wp-event-solution/</url>
    <description>CVE-2026-105073: Possible WP Event Solution sensitive information disclosure attempt</description>
    <mitre>
      <id>T1592</id>
    </mitre>
    <group>recon,</group>
  </rule>
</group>

Mitigation & Patch Guidance

Patch confidence: 0/4 (UNPATCHED — no patch evidence from any tracked source). No vendor fix, workaround, or affected-version patch reference is available in the provided data. The plugin is affected through version 4.1.25.

1. Immediate mitigations:

• If WP Event Solution is not business-critical, deactivate and remove it from all WordPress instances until a patched version is released.
• If the plugin must remain active, restrict access to plugin endpoints behind an authenticated reverse proxy or WAF rule that blocks unauthenticated access to wp-content/plugins/wp-event-solution/ request paths.
• Apply virtual patching via WAF to monitor and block anomalous data-retrieval requests to plugin endpoints.
• Audit exposed data returned by the plugin and rotate any secrets, API keys, or credentials that may have been disclosed.

2. Patch/upgrade steps:

• Monitor the Arraytics WP Event Solution plugin page and the WordPress plugin repository for a fixed release newer than 4.1.25.
• When a patch becomes available, stage-test and deploy it across all instances; no patch version currently exists per tracked sources.
• Subscribe to vendor and CVE feeds for the fix announcement.

3. Long-term hardening:

• Maintain an inventory of all WordPress plugins and versions; subscribe to vulnerability feeds for each.
• Minimize the number of active plugins to reduce attack surface.
• Enforce least-privilege and defense-in-depth: place administrative endpoints behind authentication and restrict direct public access to plugin internals.
• Deploy WAF and access logging with alerting for reconnaissance patterns targeting plugin directories.
• Conduct periodic exposure reviews to confirm plugins do not return sensitive data without authorization checks.

References

• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-105073
• CWE-497 – Exposure of Sensitive System Information to an Unauthorized Control Sphere: https://cwe.mitre.org/data/definitions/497.html
• MITRE ATT&CK T1592 – Gather Victim Host Information: https://attack.mitre.org/techniques/T1592/
• WordPress Plugin Directory (WP Event Solution by Arraytics): https://wordpress.org/plugins/wp-event-solution/
• CISA Known Exploited Vulnerabilities Catalog (no listing for this CVE as of reporting): https://www.cisa.gov/known-exploited-vulnerabilities-catalog

No known threat actor campaigns or exploit-in-the-wild evidence are associated with CVE-2026-105073 based on the data provided; there is no CISA KEV listing and no public PoC.