# CVE-2026-125451: bPlugins B Blocks stored cross-site scripting

Source: https://junglewise.ai/threats/cve-2026-125451-improper-neutralization-of-input-during-web-page-generation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-11. Updated: 2026-11-11  
License: CC BY 4.0 with a link back

CVE-2026-125451 · Severity: medium · CVSS 6.5 · Published 2026-11-11

B Blocks is a WordPress plugin that adds Gutenberg block editing capabilities to WordPress sites. The plugin contains a stored cross-site scripting vulnerability that allows authenticated attackers with contributor-level permissions to inject malicious scripts into the site. Successful exploitation could enable attackers to steal visitor data, hijack user accounts, or deface the website.

Technologies: [bPlugins B Blocks](https://junglewise.ai/threats/technologies/b-blocks). Vendors: [bPlugins](https://junglewise.ai/threats/vendors/bplugins).

## Quick answers

**Is CVE-2026-125451 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-125451 being exploited in the wild.

**How severe is CVE-2026-125451?** Medium severity, with a CVSS score of 6.5, published 11 November 2026.

**Which products and versions are affected?** bPlugins B Blocks through 2.1.15.

**Is there a fix for CVE-2026-125451?** Yes: fixed in 2.1.16. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-125451 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-125451?** Check whether you run bPlugins B Blocks 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 2.1.16

## Technical details

The vulnerability is an improper neutralization of input during web page generation, resulting in stored XSS. Exploitation requires contributor-level or higher privileges and user interaction (such as clicking a malicious link or submitting a form). The attacker gains the ability to execute arbitrary JavaScript in the context of the website for all visitors.

## Affected products

- bPlugins B Blocks through 2.1.15

## Timeline

- 2026-10-17: disclosed: Reported to Patchstack
- 2026-11-11: advisory: Published by Patchstack

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/b-blocks/vulnerability/wordpress-b-blocks-plugin-2-1-15-cross-site-scripting-xss-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/b-blocks/vulnerability/wordpress-b-blocks-plugin-2-1-15-cross-site-scripting-xss-vulnerability?_s_id=cve)

## Related threats

- [bPlugins B Blocks stored cross-site scripting](https://junglewise.ai/threats/cve-2026-104400-improper-neutralization-of-input-during-web-page-generation)
- [bPlugins B Blocks privilege escalation in WordPress plugin](https://junglewise.ai/threats/cve-2026-39579-bplugins-b-blocks-privilege-escalation-in-wordpress-plugin)