# CVE-2026-116400: bPlugins Button Block stored cross-site scripting

Source: https://junglewise.ai/threats/cve-2026-116400-improper-neutralization-of-input-during-web-page-generation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-26. Updated: 2026-10-26  
License: CC BY 4.0 with a link back

CVE-2026-116400 · Severity: medium · CVSS 6.5 · Published 2026-10-26

Button Block is a WordPress plugin that enables block-based button creation for website pages. A stored cross-site scripting (XSS) vulnerability in versions up to 1.2.7 allows authenticated attackers to inject malicious scripts that execute in the browsers of site visitors, potentially stealing session cookies or hijacking user accounts.

Vendors: [bPlugins](https://junglewise.ai/threats/vendors/bplugins).

## Quick answers

**Is CVE-2026-116400 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-116400 being exploited in the wild.

**How severe is CVE-2026-116400?** Medium severity, with a CVSS score of 6.5, published 26 October 2026.

**Which products and versions are affected?** bPlugins Button Block through 1.2.7.

**Is there a fix for CVE-2026-116400?** Yes: fixed in 1.2.8. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-116400 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-116400?** Check whether you run bPlugins Button Block at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 1.2.8

## Technical details

The plugin fails to properly sanitize user input during web page generation, allowing authenticated users with contributor or higher privileges to inject malicious JavaScript that persists in the database and executes client-side when pages are viewed. Exploitation requires user interaction (a privileged user must perform an action like clicking a link), and the attack vector is network-based through the WordPress admin interface.

## Affected products

- bPlugins Button Block through 1.2.7

## Timeline

- 2026-10-17: disclosed: Reported to Patchstack
- 2026-10-26: advisory: Published by Patchstack

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/button-block/vulnerability/wordpress-button-block-plugin-1-2-7-cross-site-scripting-xss-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/button-block/vulnerability/wordpress-button-block-plugin-1-2-7-cross-site-scripting-xss-vulnerability?_s_id=cve)