CyberSecBulletin
CVE-2026-116615NVD status: Deferred

Widget Options – Advanced Conditional…: Improper Control of Generation of Code

Published Updated By the CyberSecBulletin desk

CVE-2026-116615 is a high-severity improper control of generation of code vulnerability in Widget Options – Advanced Conditional Visibility for Gutenberg Blocks & Classic Widgets from MarketingFire, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. Affected Widget Options – Advanced Conditional Visibility for Gutenberg Blocks & Classic Widgets versions: 4.2.6.1 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.88% chance of exploitation within 30 days, higher than 60% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of Widget Options – Advanced Conditional Visibility for Gutenberg Blocks & Classic Widgets you run against the affected versions below, and install the vendor's latest release.

Affected products and versions

VendorProductAffected versionsFixed in
MarketingfireWidget Options – Advanced Conditional Visibility for Gutenberg Blocks & Classic Widgets4.2.6.1 and earlierNot stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (wordfence.com).

Official description

The Widget Options – Advanced Conditional Visibility for Gutenberg Blocks & Classic Widgets plugin for WordPress is vulnerable to Code Injection in all versions up to, and including, 4.2.6.1 via the `post_content` parameter. This is due to asymmetric parsing between the save-time strip filter (`widgetopts_strip_logic_from_blocks()`) and the render-time parser (`blockopts_filter_before_display()`): embedding an inner `<!--start_widgetopts` literal inside a JSON key causes the write-side `json_decode` to see a non-`class` key and skip stripping — persisting the payload verbatim to the database — while the render-side `str_replace` reconstitutes the key to `class`, feeding the attacker-controlled `logic` value directly into `@eval`. This makes it possible for authenticated attackers, with Author-level access and above, to inject PHP expressions that execute on every front-end page view, enabling boolean-oracle exfiltration of WordPress site configuration data — including admin email address, default role, and arbitrary `get_option`, `get_user_meta`, and `get_post_meta` values — via the plugin's allowlisted-function sandbox, which escalates to unrestricted code execution if any installed plugin extends the `widgetopts_allowed_php_functions` filter. Contributors can also exploit this vulnerability when their submitted post is later published by an administrator; notably, the injected payload executes for all site visitors, including unauthenticated users, because a trust-flag mechanism introduced in version 4.2.6 causes `widgetopts_safe_eval_trusted()` to bypass its non-admin short-circuit at every legacy render callsite. Exploitation by attackers with contributor-level access and above requires that an administrator (or editor) later publishes the contributor's submission. On a default installation, where that is not configured, the vulnerability requires attackers with author-level access and above.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Control of Generation of Code

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.

How developers prevent this class of flaw

  • Refactor your program so that you do not have to dynamically generate code.
  • Run your code in a jail or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which code can be executed by your product. Examples include the Unix chroot jail and AppArmor. In general, managed code may provide some protection. This may not be a feasible solution, and it only limits the impact to the operating system; the rest of your application may still be subject to compromise. Be careful to avoid CWE-243 and other weaknesses related to jails.
  • Use dynamic tools and techniques that interact with the product using large test suites with many diverse inputs, such as fuzz testing (fuzzing), robustness testing, and fault injection. The product's operation may slow down, but it should not become unstable, crash, or generate incorrect results.

More Improper Control of Generation of Code vulnerabilities (CWE-94)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).

References

Other vulnerabilities in Widget Options – Advanced Conditional Visibility for Gutenberg Blocks & Classic Widgets

All Widget Options – Advanced Conditional Visibility for Gutenberg Blocks & Classic Widgets vulnerabilities

Recent Improper Control of Generation of Code vulnerabilities

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