Marketing Fire Widget Options Plugin up to 4.2.2 on WordPress eval extended_widget_opts_block code injection

Summaryinfo

A vulnerability described as critical has been identified in Marketing Fire Widget Options Plugin up to 4.2.2 on WordPress. This impacts the function eval. Executing a manipulation of the argument extended_widget_opts_block can lead to code injection. This vulnerability is registered as CVE-2026-2052. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as critical was found in Marketing Fire Widget Options Plugin up to 4.2.2 on WordPress. This vulnerability affects the function eval. The manipulation of the argument extended_widget_opts_block with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The Widget Options – Advanced Conditional Visibility for Gutenberg Blocks & Classic Widgets plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 4.2.2 via the Display Logic feature. This is due to the plugin using eval() on user-supplied Display Logic expressions with an insufficient blocklist/allowlist that can be bypassed using array_map with string concatenation, combined with a lack of authorization enforcement on the extended_widget_opts_block attribute. This makes it possible for authenticated attackers, with Contributor-level access and above, to execute code on the server. The vulnerability was partially patched in version 4.2.0.

The weakness was published by Matthew Rollings and Hung Nguyen. The advisory is shared for download at wordfence.com. This vulnerability was named CVE-2026-2052 since 02/06/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/02/2026). The MITRE ATT&CK project declares the attack technique as T1059.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-26754). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Marketing Software

Vendor

• Marketing Fire

Name

• Widget Options Plugin

Version

• 4.2.0
• 4.2.1
• 4.2.2

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Once again VulDB remains the best source for vulnerability data.

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