# CVE-2026-57428: BoldGrid Sprout Clients unauthenticated XSS

Source: https://junglewise.ai/threats/cve-2026-57428-boldgrid-sprout-clients-unauthenticated-xss  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-23. Updated: 2026-07-23  
License: CC BY 4.0 with a link back

CVE-2026-57428 · Severity: high · CVSS 7.1 · Published 2026-07-23

Sprout Clients is a WordPress plugin used by businesses to manage client relationships and communications. A security flaw in versions 3.2.3 and earlier allows an unauthenticated attacker to inject malicious scripts into the website. If a site administrator or visitor interacts with a specially crafted link, the attacker could steal session information, redirect users to malicious sites, or perform unauthorized actions on the website.

Vendors: [BoldGrid](https://junglewise.ai/threats/vendors/boldgrid).

## Quick answers

**Is CVE-2026-57428 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-57428 being exploited in the wild.

**How severe is CVE-2026-57428?** High severity, with a CVSS score of 7.1, published 23 July 2026.

**Which products and versions are affected?** BoldGrid Sprout Clients <= 3.2.3.

**Is there a fix for CVE-2026-57428?** A patch was published on 2026-07-23: Patch confirmed available in version 3.2.4 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-57428 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-57428?** Check whether you run BoldGrid Sprout Clients 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.

## Technical details

The Sprout Clients plugin for WordPress (versions <= 3.2.3) contains an unauthenticated Cross-Site Scripting (XSS) vulnerability due to improper neutralization of input during web page generation (CWE-79). An attacker can exploit this by sending a crafted request to a vulnerable site, which requires a user (typically an administrator) to perform an action such as clicking a malicious link. Successful exploitation allows the execution of arbitrary JavaScript in the context of the victim's browser session, potentially leading to session hijacking or unauthorized administrative actions. The issue is resolved in version 3.2.4.

## Affected products

- BoldGrid Sprout Clients <= 3.2.3

## Timeline

- 2026-06-08: other: Vulnerability reported by researcher dutafi
- 2026-07-16: advisory: Initial advisory published by Patchstack
- 2026-07-23: disclosed: CVE published to NVD dataset
- 2026-07-23: patched: Patch confirmed available in version 3.2.4

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/sprout-clients/vulnerability/wordpress-sprout-clients-plugin-3-2-3-cross-site-scripting-xss-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/sprout-clients/vulnerability/wordpress-sprout-clients-plugin-3-2-3-cross-site-scripting-xss-vulnerability?_s_id=cve)