# Widget Options – Advanced Conditional Visibility for Gutenberg Blocks & Classic Widgets <= 4.2.6.1 - Authenticated (Contributor+) Remote Code Execution via Display Logic in Freeform Block Marker

- **ID:** WPSEC-2026-2846
- **Plugin:** Widget Options – Advanced Conditional Visibility for Gutenberg Blocks & Classic Widgets (`widget-options`), https://wordpress.org/plugins/widget-options/
- **Affected versions:** from 4.0.0 before 4.2.7
- **Fixed in:** 4.2.7 (Update to 4.2.7 or later.)
- **Severity:** High 8.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
- **Weakness:** CWE-94
- **Usage among sites WPSec scans:** plugin High, affected versions Medium (as of 2026-11-12)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/widget-options
- **Fix released:** 2026-11-11
- **Published:** 2026-11-12
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2846/

## Description

The Widget Options plugin for WordPress is vulnerable to Remote Code Execution via the legacy freeform display-logic marker (<!--start_widgetopts ... end_widgetopts-->) in post content in all versions up to, and including, 4.2.6.1. This is due to the save-time filter that strips display logic from non-administrator content and the render-time parser decoding the marker differently: the parser removes every marker delimiter from the payload before JSON-decoding it, so a payload that the strip filter re-encodes with an empty logic value can still carry display logic that is evaluated with eval() at render time. This makes it possible for authenticated attackers, with Contributor-level access and above, to execute arbitrary PHP code on the server when the Display Logic module is enabled.

## References

- https://wpsec.com/vuln/WPSEC-2026-2846/
- https://plugins.svn.wordpress.org/widget-options/tags/4.2.7/
- https://wordpress.org/plugins/widget-options/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2846/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.