# CVE-2026-42734: Dylan Kuhn Geo Mashup Reflected XSS

Source: https://junglewise.ai/threats/cve-2026-42734-dylan-kuhn-geo-mashup-reflected-xss  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-27. Updated: 2026-05-27  
License: CC BY 4.0 with a link back

CVE-2026-42734 · Severity: high · CVSS 7.1 · Published 2026-05-27

Geo Mashup is a WordPress plugin used to integrate maps and geographic data into website content. A security flaw in this plugin allows attackers to trick a user into clicking a malicious link, which then executes unauthorized code in the user's browser. This can lead to the theft of login sessions, unauthorized website changes, or the redirection of visitors to malicious sites.

Technologies: [Dylan Kuhn Geo Mashup](https://junglewise.ai/threats/technologies/geo-mashup). Vendors: [Dylan Kuhn](https://junglewise.ai/threats/vendors/dylan-kuhn).

## Quick answers

**Is CVE-2026-42734 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-42734 being exploited in the wild.

**How severe is CVE-2026-42734?** High severity, with a CVSS score of 7.1, published 27 May 2026.

**Which products and versions are affected?** Dylan Kuhn Geo Mashup <= 1.13.19.

**Is there a fix for CVE-2026-42734?** A patch was published on 2026-05-26: Version 1.13.20 released to address the issue Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-42734 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-42734?** Check whether you run Dylan Kuhn Geo Mashup 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

A Reflected Cross-Site Scripting (XSS) vulnerability exists in the Dylan Kuhn Geo Mashup plugin for WordPress due to improper neutralization of user-supplied input during web page generation. The flaw is present in versions up to and including 1.13.19. An unauthenticated remote attacker can exploit this by enticing a user to visit a specially crafted URL. Successful exploitation allows the attacker to execute arbitrary JavaScript in the context of the victim's browser session, potentially leading to session hijacking or unauthorized actions. The issue is resolved in version 1.13.20.

## Affected products

- Dylan Kuhn Geo Mashup <= 1.13.19

## Timeline

- 2026-04-26: other: Vulnerability reported by researcher she11f
- 2026-05-26: advisory: Patchstack advisory published
- 2026-05-27: disclosed: NVD publication date
- 2026-05-26: patched: Version 1.13.20 released to address the issue

## References

- [https://patchstack.com/database/Wordpress/Plugin/geo-mashup/vulnerability/wordpress-geo-mashup-plugin-1-13-19-cross-site-scripting-xss-vulnerability?_s_id=cve](https://patchstack.com/database/Wordpress/Plugin/geo-mashup/vulnerability/wordpress-geo-mashup-plugin-1-13-19-cross-site-scripting-xss-vulnerability?_s_id=cve)

## Related threats

- [Geo Mashup broken access control in pages](https://junglewise.ai/threats/cve-2026-115954-missing-authorization-vulnerability-in-dylan-kuhn-geo-mashup-geo)
- [Geo Mashup stored cross-site scripting](https://junglewise.ai/threats/cve-2026-115953-improper-neutralization-of-input-during-web-page-generation)
- [Geo Mashup reflected cross-site scripting](https://junglewise.ai/threats/cve-2026-111848-improper-neutralization-of-input-during-web-page-generation)
- [Geo Mashup cross-site scripting](https://junglewise.ai/threats/cve-2026-97250-unauthenticated-cross-site-scripting-xss-in-geo-mashup-1-13-21)
- [Dylan Kuhn Geo Mashup SQL injection in WordPress plugin](https://junglewise.ai/threats/cve-2026-48967-dylan-kuhn-geo-mashup-sql-injection-in-wordpress-plugin)