CVE-2026-2052: WordPress Plugin RCE Exposes Sites to Contributors
The National Vulnerability Database has detailed CVE-2026-2052, a critical Remote Code Execution (RCE) vulnerability impacting the Widget Options – Advanced Conditional Visibility for Gutenberg Blocks & Classic Widgets plugin for WordPress. Affecting all versions up to, and including, 4.2.2, this flaw carries a CVSS score of 8.8 (HIGH), indicating severe risk.
The vulnerability stems from the plugin’s eval() function, which processes user-supplied Display Logic expressions. According to the National Vulnerability Database, an inadequate blocklist/allowlist can be bypassed using array_map with string concatenation. This, combined with a lack of authorization enforcement on the extended_widget_opts_block attribute, allows authenticated attackers with Contributor-level access or higher to execute arbitrary code on the server. A partial patch was released in version 4.2.0, but the underlying issue persists in earlier versions.
This is a classic case of insecure deserialization and privilege escalation. Attackers only need basic authenticated access—Contributor roles are common on many WordPress sites. Once they have that, they can leverage this RCE to gain full control of the web server. For organizations, this means a compromised Contributor account is just one step away from a complete site takeover, data exfiltration, or defacement. The attacker’s calculus is simple: target sites with this plugin, find any authenticated user, and elevate privileges to full system compromise. Defenders must prioritize patching and understanding their WordPress plugin attack surface.
What This Means For You
- If your organization uses the Widget Options – Advanced Conditional Visibility for Gutenberg Blocks & Classic Widgets plugin for WordPress, check your version immediately. Patch to the latest available version beyond 4.2.2. Audit your WordPress user roles and ensure no unnecessary Contributor-level access or higher is granted. This RCE is trivially exploitable once an attacker has basic authenticated access.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-20252: WordPress Widget Options RCE via Display Logic
title: CVE-2026-20252: WordPress Widget Options RCE via Display Logic
id: scw-2026-05-02-ai-1
status: experimental
level: critical
description: |
Detects attempts to exploit CVE-2026-2052 by targeting the Widget Options plugin's Display Logic feature through the admin-ajax.php endpoint. This rule specifically looks for the 'widget_options_display_logic' action in the URI query, indicative of the vulnerable functionality being invoked.
author: SCW Feed Engine (AI-generated)
date: 2026-05-02
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-2052/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/wp-admin/admin-ajax.php'
cs-uri-query|contains:
- 'action=widget_options_display_logic'
cs-method|exact:
- 'POST'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-2052 | RCE | WordPress Plugin: Widget Options – Advanced Conditional Visibility for Gutenberg Blocks & Classic Widgets |
| CVE-2026-2052 | RCE | Affected versions: All versions up to, and including, 4.2.2 |
| CVE-2026-2052 | RCE | Vulnerable feature: Display Logic |
| CVE-2026-2052 | RCE | Attack vector: eval() on user-supplied Display Logic expressions via array_map with string concatenation |
| CVE-2026-2052 | Auth Bypass | Lack of authorization enforcement on extended_widget_opts_block attribute |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 02, 2026 at 11:16 UTC |
This content was AI-rewritten and enriched by Shimi's Cyber World based on the original source. All intellectual property rights remain with the original author.
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