CVE-2026-14858

Executive Summary

CVE-2026-14858 is an authorization bypass vulnerability in the Themeum WP Crowdfunding WordPress plugin, affecting versions before 2.2.1. The plugin fails to verify that an authenticated user owns a WooCommerce order before returning order details, allowing any authenticated account, including Subscribers, to read personal order data and enumerate every order in the store. The vulnerability has a CVSS score of 4.3, is not listed in CISA KEV, and no public exploit or patch evidence was found during analysis.

Technical Analysis

WP Crowdfunding is a WordPress plugin that extends WooCommerce to add crowdfunding capability to a store. The vulnerable code path is described in the NVD entry as follows: the plugin “does not verify order ownership before returning order details.” In practice, this means that when an authenticated user requests information about an order, the application performs a lookup using the supplied order identity but omits the authorization check that would confirm the requesting user is associated with that order.

This flaw belongs to the CWE-639 class, “Authorization Bypass Through User-Controlled Key,” commonly referred to as an Insecure Direct Object Reference (IDOR). The vulnerable mechanism most likely follows this pattern:

1. The authenticated user triggers an order-details request through the plugin’s WordPress-facing functionality.
2. The request identifies a particular order by an object identifier, such as a sequential order ID.
3. The backend retrieves the order record and returns it to the requester.
4. The code does not compare the order’s owner or customer account with the authenticated session.

Because the NVD description does not disclose the exact endpoint, parameter name, or internal function name, public documentation is insufficient to name specific implementation details. The vulnerability class itself is enough, however, to understand the risk: any order ID accepted by the vulnerable handler can be read by any authenticated user, and because order identifiers in WooCommerce are generally sequential, an attacker can enumerate all orders by cycling through identifiers.

The attack surface is the WordPress web application itself. The requirement of a valid authenticated account lowers the barrier for exploitation because many WordPress sites allow user self-registration at the Subscriber role. WooCommerce order records contain substantial personal information, including customer names, billing and shipping addresses, email addresses, phone numbers, and order contents. Such data is considered sensitive in most privacy regulatory frameworks. The affected component is therefore not merely a metadata leak; it exposes customer PII to low-privileged users.

No public proof-of-concept, Nuclei template, or exploit code was identified at the time of this report. The absence of a public PoC reduces immediate exploitation likelihood, but the flaw is straightforward to discover and exploit manually once an attacker inspects the plugin’s order-detail request flow.

Exploitation Scenarios

The attack chain for CVE-2026-14858 is inferred from the NVD description and the IDOR vulnerability class. No public PoC is available, so the following scenario represents the likely exploitation path.

1. Reconnaissance / target identification
   An attacker identifies a WordPress site running the WP Crowdfunding plugin version prior to 2.2.1. The presence of the plugin may be confirmed through page source, plugin asset paths, or typical WordPress fingerprinting techniques. The attacker also confirms that the site uses WooCommerce and that low-privilege user registration is enabled or that a Subscriber account can be obtained.

2. Authentication and request preparation
   The attacker logs in with an ordinary Subscriber account. This account is not granted shop manager, administrator, or customer-level access. The attacker then navigates to the WP Crowdfunding order-related functionality and intercepts the browser’s request for order details, noting the identifier format used to reference a WooCommerce order.

3. Triggering the authorization bypass
   The attacker submits a request for an order that belongs to another customer. Because the plugin fails to verify order ownership, the server processes the request as valid. The attacker repeats this process with different order identifiers. The IDOR condition makes it possible to retrieve each stored order’s details without any privilege escalation.

4. Post-exploitation impact
   The attacker collects a large volume of customer PII, including names, addresses, email addresses, phone numbers, and purchased items. This data can be used for targeted phishing, social engineering, credential stuffing, or sold on criminal marketplaces. The store operator faces potential data breach notification obligations, regulatory penalties, and loss of customer trust.

It is important to note that the NVD description does not include the exact request syntax or endpoint. Therefore, the enumeration mechanism described above is based on the vulnerability class rather than on observed exploit code.

Impact Assessment

The CVSS vector for CVE-2026-14858 is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N, producing a base score of 4.3. The network attack vector, low attack complexity, and low privilege requirement mean the vulnerability is easy to execute once an account is available. The scope is unchanged and there is no direct integrity or availability impact.

The confidentiality impact is rated Low because each request discloses one order’s data; however, repeated requests can disclose every order in the store. This aggregate exposure may be materially higher than the CVSS subscore suggests, particularly for e-commerce sites handling large numbers of customer orders. The affected data is PII, which is regulated under GDPR, CCPA, and similar laws.

The blast radius includes every WordPress installation with the WP Crowdfunding plugin prior to 2.2.1, provided there are stored WooCommerce orders. Any authenticated user on the site is a potential threat actor. The EPSS score of 0.00197 places this CVE in a low percentile of observed exploitation likelihood, and it is not present in CISA’s Known Exploited Vulnerabilities catalog. Nevertheless, the potential for mass PII extraction and the absence of a confirmed patch make this vulnerability significant for affected store operators.

Detection Guidance

Detection of CVE-2026-14858 is challenging because the vulnerability is triggered by legitimate-looking authenticated requests. The rules below are heuristics designed to identify suspicious enumeration behavior. They should be tuned to the web server and WordPress access log schema used in the environment.

Sigma Rule

title: WP Crowdfunding Order Enumeration Attempt
id: 6f2c9a1e-4a5b-4c7d-8e9f-1b2c3d4e5f6a
status: experimental
description: Detects a single authenticated user making many requests to WP Crowdfunding order-related resources, potentially indicating CVE-2026-14858 IDOR enumeration.
logsource:
  category: webserver
  product: apache
detection:
  selection:
    c-uri|contains: "wp-crowdfunding"
  filter_baseline:
    c-uri|contains:
      - "wp-crowdfunding/admin"
      - "wp-crowdfunding/assets"
  timeframe: 5m
  condition: selection and not filter_baseline | count() by cs-username > 30
level: medium
fields:
  - cs-username
  - src_ip
  - c-uri
falsepositives:
  - Legitimate administrators bulk-viewing orders
  - Plugin diagnostic tools

YARA Rule

rule CVE_2026_14858_WP_Crowdfunding_IDOR
{
    meta:
        author = "Valtersit Threat Intelligence"
        description = "Detects script files, packet captures, or logs containing WP Crowdfunding and order-data references consistent with IDOR enumeration."
        cve = "2026-14858"
        date = "2026-04-14"
        severity = "medium"

    strings:
        $plugin_ref = "wp-crowdfunding" ascii nocase
        $order_ctx  = "order" ascii nocase
        $woo_ctx    = "woocommerce" ascii nocase

    condition:
        $plugin_ref and $order_ctx and $woo_ctx
}

Suricata IDS Rule

alert http any any -> any any (
  msg:"CVE-2026-14858 WP Crowdfunding Order IDOR Enumeration";
  flow:to_server,established;
  http.uri;
  content:"wp-crowdfunding";
  http.uri;
  content:"order";
  http.method;
  content:"GET";
  threshold: type threshold, track by_src_ip, count 50, seconds 300;
  reference:cve,2026-14858;
  classtype:attempted-recon;
  sid:202614858;
  rev:1;
)

Elastic Detection

sequence by user.name with maxspan=5m
  [ network where http.request.uri contains "wp-crowdfunding" and http.response.status_code == 200 ]
  [ network where http.request.uri contains "wp-crowdfunding" and http.response.status_code == 200 ]
  [ network where http.request.uri contains "wp-crowdfunding" and http.response.status_code == 200 ]

This EQL rule triggers when the same authenticated user makes several successful requests to the WP Crowdfunding component within five minutes. It is intentionally broad and should be combined with additional context, such as an abnormal URI count per session, to reduce false positives.

Splunk SPL Query

index=web sourcetype=access_combined
| search uri_path LIKE "%wp-crowdfunding%" AND status=200
| stats count BY user, src_ip, uri_path
| where count > 30
| sort - count
| table _time, user, src_ip, uri_path, count

The query identifies authenticated users or source IPs that repeatedly request WP Crowdfunding resources with successful responses. Security teams can adjust the threshold based on baseline traffic. An alert should be raised for Subscriber-level accounts that exceed normal usage patterns.

Wazuh OSSEC Rule

<group name="wordpress,">
  <rule id="100421" level="8">
    <decoded_as>web-access</decoded_as>
    <match>wp-crowdfunding</match>
    <description>WP Crowdfunding order detail request detected - possible CVE-2026-14858 targeting</description>
    <group>pci_dss_6.5,gdpr_art32,</group>
  </rule>

  <rule id="100422" level="12" frequency="30" timeframe="300">
    <if_matched_sid>100421</if_matched_sid>
    <description>Possible CVE-2026-14858 WP Crowdfunding order enumeration activity</description>
    <group>pci_dss_6.5,gdpr_art32,</group>
  </rule>
</group>

The first rule logs individual WP Crowdfunding requests. The second rule correlates at least 30 such requests from the same source within 300 seconds and raises a high-severity alert, indicating possible order enumeration.

Mitigation & Patch Guidance

Patch confidence for CVE-2026-14858 is 0/4 — no patch evidence has been identified in any tracked source. Although the NVD description states the vulnerable versions are before 2.2.1, there is no verified vendor advisory or release confirmation available at the time of writing. Treat the vulnerability as unpatched until Themeum or its advisory channels confirm a fix.

1. Immediate mitigations

   • Disable WordPress user self-registration if Subscriber accounts are not required for the site.
   • Audit existing Subscriber accounts and remove inactive or suspicious accounts.
   • Restrict access to WP Crowdfunding functionality where possible using role-based access control plugins.
   • Apply web application firewall rules that limit the request rate to order-detail endpoints for non-admin users.
   • Monitor access logs for enumeration patterns using the detection guidance above.

2. Patch / upgrade steps

   • Monitor Themeum’s official update channel and WordPress plugin repository for a release containing version 2.2.1 or later.
   • Before applying an update, verify the vendor’s advisory, checksum, and changelog to confirm the fix addresses authorization checks.
   • If a 2.2.1 or later installation is confirmed, upgrade all test and production environments as soon as possible.
   • After upgrading, retest the order-detail flow with two distinct test customer accounts to confirm cross-account access is blocked.

3. Long-term hardening

   • Perform a code review of all plugin object lookups to ensure ownership checks are enforced consistently.
   • Add automated IDOR tests to the CI/CD pipeline for WordPress plugin updates.
   • Ensure web server, database, and authentication logs are retained and correlated with a SIEM.
   • Apply the principle of least privilege to all WordPress roles, and consider stricter default roles for newly registered users.
   • Subscribe to CVE and vendor-advisory feeds for WordPress plugin vulnerabilities.

References

• NVD Entry: https://nvd.nist.gov/vuln/detail/CVE-2026-14858
• CVE.org Record: https://www.cve.org/CVERecord?id=CVE-2026-14858
• CWE-639 Reference: https://cwe.mitre.org/data/definitions/639.html
• ATT&CK Collection Tactic: https://attack.mitre.org/tactics/TA0009/
• CISA KEV Catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

At the time of writing, there is no evidence of threat actor campaigns exploiting CVE-2026-14858 in the wild, no public exploit code, and no CISA KEV listing. The absence of a confirmed patch, combined with the ease of manual IDOR exploitation, warrants continued monitoring and defensive preparation.